diff --git a/Pipfile.lock b/Pipfile.lock
index 144b76341..1827304e7 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "565438bd4d0ebd0ade4663ace9010283a3bf2336be3c5aff5e81fe0450adcd5d"
+            "sha256": "2190d84ebfce224526e180d5829670f5dbdb47832bab292d3d4eaae8ea25c121"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -16,28 +16,20 @@
         ]
     },
     "default": {
-        "appnope": {
-            "hashes": [
-                "sha256:02bd91c4de869fbb1e1c50aafc4098827a7a54ab2f39d9dcba6c9547ed920e24",
-                "sha256:265a455292d0bd8a72453494fa24df5a11eb18373a60c7c0430889f22548605e"
-            ],
-            "markers": "sys_platform == 'darwin'",
-            "version": "==0.1.3"
-        },
         "asttokens": {
             "hashes": [
-                "sha256:4622110b2a6f30b77e1473affaa97e711bc2f07d3f10848420ff1898edbe94f3",
-                "sha256:6b0ac9e93fb0335014d382b8fa9b3afa7df546984258005da0b9e7095b3deb1c"
+                "sha256:051ed49c3dcae8913ea7cd08e46a606dba30b79993209636c4875bc1d637bc24",
+                "sha256:b03869718ba9a6eb027e134bfdf69f38a236d681c83c160d510768af11254ba0"
             ],
-            "version": "==2.2.1"
+            "version": "==2.4.1"
         },
         "attrs": {
             "hashes": [
-                "sha256:29e95c7f6778868dbd49170f98f8818f78f3dc5e0e37c0b1f474e3561b240836",
-                "sha256:c9227bfc2f01993c03f68db37d1d15c9690188323c067c641f1a35ca58185f99"
+                "sha256:935dc3b529c262f6cf76e50877d35a4bd3c1de194fd41f47a2b7ae8f19971f30",
+                "sha256:99b87a485a5820b23b879f04c2305b44b951b502fd64be915879d77a7e8fc6f1"
             ],
-            "markers": "python_version >= '3.6'",
-            "version": "==22.2.0"
+            "markers": "python_version >= '3.7'",
+            "version": "==23.2.0"
         },
         "backcall": {
             "hashes": [
@@ -51,23 +43,34 @@
                 "sha256:637996211036b6385ef91435e4fae22989472f9d571faba8927ba8253acbc330",
                 "sha256:b8c3f85900b9dc423225913c5aace94729fe1fa9763b38939a95226f02d37186"
             ],
-            "markers": "python_version < '3.11' and python_version >= '3.7'",
+            "markers": "python_version >= '3.5'",
             "version": "==5.1.1"
         },
-        "exceptiongroup": {
+        "executing": {
             "hashes": [
-                "sha256:327cbda3da756e2de031a3107b81ab7b3770a602c4d16ca618298c526f4bec1e",
-                "sha256:bcb67d800a4497e1b404c2dd44fca47d3b7a5e5433dbab67f96c1a685cdfdf23"
+                "sha256:35afe2ce3affba8ee97f2d69927fa823b08b472b7b994e36a52a964b93d16147",
+                "sha256:eac49ca94516ccc753f9fb5ce82603156e590b27525a8bc32cce8ae302eb61bc"
             ],
-            "markers": "python_version < '3.11'",
-            "version": "==1.1.0"
+            "markers": "python_version >= '3.5'",
+            "version": "==2.0.1"
         },
-        "executing": {
+        "importlib-metadata": {
             "hashes": [
-                "sha256:0314a69e37426e3608aada02473b4161d4caf5a4b244d1d0c48072b8fee7bacc",
-                "sha256:19da64c18d2d851112f09c287f8d3dbbdf725ab0e569077efb6cdcbd3497c107"
+                "sha256:7efb448ec9a5e313a57655d35aa54cd3e01b7e1fbcf72dce1bf06119420f5bad",
+                "sha256:e354bedeb60efa6affdcc8ae121b73544a7aa74156d047311948f6d711cd378d"
             ],
-            "version": "==1.2.0"
+            "index": "pypi",
+            "markers": "python_version >= '3.7'",
+            "version": "==6.0.0"
+        },
+        "importlib-resources": {
+            "hashes": [
+                "sha256:c01b1b94210d9849f286b86bb51bcea7cd56dde0600d8db721d7b81330711668",
+                "sha256:ee17ec648f85480d523596ce49eae8ead87d5631ae1551f913c0100b5edd3437"
+            ],
+            "index": "pypi",
+            "markers": "python_version >= '3.7'",
+            "version": "==5.10.0"
         },
         "iniconfig": {
             "hashes": [
@@ -79,27 +82,27 @@
         },
         "ipdb": {
             "hashes": [
-                "sha256:c23b6736f01fd4586cc2ecbebdf79a5eb454796853e1cd8f2ed3b7b91d4a3e93",
-                "sha256:f74c2f741c18b909eaf89f19fde973f745ac721744aa1465888ce45813b63a9c"
+                "sha256:951bd9a64731c444fd907a5ce268543020086a697f6be08f7cc2c9a752a278c5"
             ],
             "index": "pypi",
-            "version": "==0.13.11"
+            "markers": "python_version >= '2.7'",
+            "version": "==0.13.9"
         },
         "ipython": {
             "hashes": [
-                "sha256:da01e6df1501e6e7c32b5084212ddadd4ee2471602e2cf3e0190f4de6b0ea481",
-                "sha256:f3bf2c08505ad2c3f4ed5c46ae0331a8547d36bf4b21a451e8ae80c0791db95b"
+                "sha256:3910c4b54543c2ad73d06579aa771041b7d5707b033bd488669b4cf544e3b363",
+                "sha256:b0340d46a933d27c657b211a329d0be23793c36595acf9e6ef4164bc01a1804c"
             ],
-            "markers": "python_version < '3.11' and python_version >= '3.7'",
-            "version": "==8.8.0"
+            "markers": "python_version >= '3.8'",
+            "version": "==8.12.3"
         },
         "jedi": {
             "hashes": [
-                "sha256:203c1fd9d969ab8f2119ec0a3342e0b49910045abe6af0a3ae83a5764d54639e",
-                "sha256:bae794c30d07f6d910d32a7048af09b5a39ed740918da923c6b780790ebac612"
+                "sha256:cf0496f3651bc65d7174ac1b7d043eff454892c708a87d1b683e57b569927ffd",
+                "sha256:e983c654fe5c02867aef4cdfce5a2fbb4a50adc0af145f70504238f18ef5e7e0"
             ],
             "markers": "python_version >= '3.6'",
-            "version": "==0.18.2"
+            "version": "==0.19.1"
         },
         "matplotlib-inline": {
             "hashes": [
@@ -111,11 +114,11 @@
         },
         "packaging": {
             "hashes": [
-                "sha256:714ac14496c3e68c99c29b00845f7a2b85f3bb6f1078fd9f72fd20f0570002b2",
-                "sha256:b6ad297f8907de0fa2fe1ccbd26fdaf387f5f47c7275fedf8cce89f99446cf97"
+                "sha256:048fb0e9405036518eaaf48a55953c750c11e1a1b68e0dd1a9d62ed0c092cfc5",
+                "sha256:8c491190033a9af7e1d931d0b5dacc2ef47509b34dd0de67ed209b5203fc88c7"
             ],
             "markers": "python_version >= '3.7'",
-            "version": "==23.0"
+            "version": "==23.2"
         },
         "parso": {
             "hashes": [
@@ -127,11 +130,11 @@
         },
         "pexpect": {
             "hashes": [
-                "sha256:0b48a55dcb3c05f3329815901ea4fc1537514d6ba867a152b581d69ae3710937",
-                "sha256:fc65a43959d153d0114afe13997d439c22823a27cefceb5ff35c2178c6784c0c"
+                "sha256:7236d1e080e4936be2dc3e326cec0af72acf9212a7e1d060210e70a47e253523",
+                "sha256:ee7d41123f3c9911050ea2c2dac107568dc43b2d3b0c7557a33212c398ead30f"
             ],
             "markers": "sys_platform != 'win32'",
-            "version": "==4.8.0"
+            "version": "==4.9.0"
         },
         "pickleshare": {
             "hashes": [
@@ -142,19 +145,19 @@
         },
         "pluggy": {
             "hashes": [
-                "sha256:4224373bacce55f955a878bf9cfa763c1e360858e330072059e10bad68531159",
-                "sha256:74134bbf457f031a36d68416e1509f34bd5ccc019f0bcc952c7b909d06b37bd3"
+                "sha256:7db9f7b503d67d1c5b95f59773ebb58a8c1c288129a88665838012cfb07b8981",
+                "sha256:8c85c2876142a764e5b7548e7d9a0e0ddb46f5185161049a79b7e974454223be"
             ],
-            "markers": "python_version >= '3.6'",
-            "version": "==1.0.0"
+            "markers": "python_version >= '3.8'",
+            "version": "==1.4.0"
         },
         "prompt-toolkit": {
             "hashes": [
-                "sha256:3e163f254bef5a03b146397d7c1963bd3e2812f0964bb9a24e6ec761fd28db63",
-                "sha256:aa64ad242a462c5ff0363a7b9cfe696c20d55d9fc60c11fd8e632d064804d305"
+                "sha256:3527b7af26106cbc65a040bcc84839a3566ec1b051bb0bfe953631e704b0ff7d",
+                "sha256:a11a29cb3bf0a28a387fe5122cdb649816a957cd9261dcedf8c9f1fef33eacf6"
             ],
-            "markers": "python_full_version >= '3.6.2'",
-            "version": "==3.0.36"
+            "markers": "python_full_version >= '3.7.0'",
+            "version": "==3.0.43"
         },
         "ptyprocess": {
             "hashes": [
@@ -170,21 +173,38 @@
             ],
             "version": "==0.2.2"
         },
+        "py": {
+            "hashes": [
+                "sha256:51c75c4126074b472f746a24399ad32f6053d1b34b68d2fa41e558e6f4a98719",
+                "sha256:607c53218732647dff4acdfcd50cb62615cedf612e72d1724fb1a0cc6405b378"
+            ],
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
+            "version": "==1.11.0"
+        },
         "pygments": {
             "hashes": [
-                "sha256:b3ed06a9e8ac9a9aae5a6f5dbe78a8a58655d17b43b93c078f094ddc476ae297",
-                "sha256:fa7bd7bd2771287c0de303af8bfdfc731f51bd2c6a47ab69d117138893b82717"
+                "sha256:b27c2826c47d0f3219f29554824c30c5e8945175d888647acd804ddd04af846c",
+                "sha256:da46cec9fd2de5be3a8a784f434e4c4ab670b4ff54d605c4c2717e9d49c4c367"
             ],
-            "markers": "python_version >= '3.6'",
-            "version": "==2.14.0"
+            "markers": "python_version >= '3.7'",
+            "version": "==2.17.2"
         },
         "pytest": {
             "hashes": [
-                "sha256:892f933d339f068883b6fd5a459f03d85bfcb355e4981e146d2c7616c21fef71",
-                "sha256:c4014eb40e10f11f355ad4e3c2fb2c6c6d1919c73f3b5a433de4708202cade59"
+                "sha256:13d0e3ccfc2b6e26be000cb6568c832ba67ba32e719443bfe725814d3c42433c",
+                "sha256:a06a0425453864a270bc45e71f783330a7428defb4230fb5e6a731fde06ecd45"
             ],
             "index": "pypi",
-            "version": "==7.2.0"
+            "markers": "python_version >= '3.7'",
+            "version": "==7.1.2"
+        },
+        "setuptools": {
+            "hashes": [
+                "sha256:385eb4edd9c9d5c17540511303e39a147ce2fc04bc55289c322b9e5904fe2c05",
+                "sha256:be1af57fc409f93647f2e8e4573a142ed38724b8cdd389706a867bb4efcf1e78"
+            ],
+            "markers": "python_version >= '3.8'",
+            "version": "==69.0.3"
         },
         "six": {
             "hashes": [
@@ -196,33 +216,57 @@
         },
         "stack-data": {
             "hashes": [
-                "sha256:32d2dd0376772d01b6cb9fc996f3c8b57a357089dec328ed4b6553d037eaf815",
-                "sha256:cbb2a53eb64e5785878201a97ed7c7b94883f48b87bfb0bbe8b623c74679e4a8"
+                "sha256:836a778de4fec4dcd1dcd89ed8abff8a221f58308462e1c4aa2a3cf30148f0b9",
+                "sha256:d5558e0c25a4cb0853cddad3d77da9891a08cb85dd9f9f91b9f8cd66e511e695"
             ],
-            "version": "==0.6.2"
+            "version": "==0.6.3"
+        },
+        "toml": {
+            "hashes": [
+                "sha256:806143ae5bfb6a3c6e736a764057db0e6a0e05e338b5630894a5f779cabb4f9b",
+                "sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f"
+            ],
+            "markers": "python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'",
+            "version": "==0.10.2"
         },
         "tomli": {
             "hashes": [
                 "sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc",
                 "sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f"
             ],
-            "markers": "python_version < '3.11' and python_version >= '3.7'",
+            "markers": "python_version >= '3.7'",
             "version": "==2.0.1"
         },
         "traitlets": {
             "hashes": [
-                "sha256:32500888f5ff7bbf3b9267ea31748fa657aaf34d56d85e60f91dda7dc7f5785b",
-                "sha256:a1ca5df6414f8b5760f7c5f256e326ee21b581742114545b462b35ffe3f04861"
+                "sha256:2e5a030e6eff91737c643231bfcf04a65b0132078dad75e4936700b213652e74",
+                "sha256:8585105b371a04b8316a43d5ce29c098575c2e477850b62b848b964f1444527e"
             ],
-            "markers": "python_version >= '3.7'",
-            "version": "==5.8.1"
+            "markers": "python_version >= '3.8'",
+            "version": "==5.14.1"
+        },
+        "typing-extensions": {
+            "hashes": [
+                "sha256:23478f88c37f27d76ac8aee6c905017a143b0b1b886c3c9f66bc2fd94f9f5783",
+                "sha256:af72aea155e91adfc61c3ae9e0e342dbc0cba726d6cba4b6c72c1f34e47291cd"
+            ],
+            "markers": "python_version < '3.10'",
+            "version": "==4.9.0"
         },
         "wcwidth": {
             "hashes": [
-                "sha256:beb4802a9cebb9144e99086eff703a642a13d6a0052920003a230f3294bbe784",
-                "sha256:c4d647b99872929fdb7bdcaa4fbe7f01413ed3d98077df798530e5b04f116c83"
+                "sha256:3da69048e4540d84af32131829ff948f1e022c1c6bdb8d6102117aac784f6859",
+                "sha256:72ea0c06399eb286d978fdedb6923a9eb47e1c486ce63e9b4e64fc18303972b5"
+            ],
+            "version": "==0.2.13"
+        },
+        "zipp": {
+            "hashes": [
+                "sha256:0e923e726174922dce09c53c59ad483ff7bbb8e572e00c7f7c46b88556409f31",
+                "sha256:84e64a1c28cf7e91ed2078bb8cc8c259cb19b76942096c8d7b84947690cabaf0"
             ],
-            "version": "==0.2.5"
+            "markers": "python_version >= '3.8'",
+            "version": "==3.17.0"
         }
     },
     "develop": {}
diff --git a/lib/functions.py b/lib/functions.py
index 9d84754d7..eae5b78c3 100644
--- a/lib/functions.py
+++ b/lib/functions.py
@@ -1,16 +1,16 @@
 #!/usr/bin/env python3
 
 def greet_programmer():
-    pass
+    print("Hello, programmer!")
 
 def greet(name):
-    pass
+    print(f"Hello, {name}!")
 
 def greet_with_default(name="programmer"):
-    pass
+    print(f"Hello, {name}!")
 
 def add(num1, num2):
-    pass
+    return num1 + num2
 
 def halve(number):
-    pass
+    return number/2