diff --git a/DataLatihan/answer1.py b/DataLatihan/answer1.py
index a489c87..e0f160f 100644
--- a/DataLatihan/answer1.py
+++ b/DataLatihan/answer1.py
@@ -7,3 +7,9 @@ def readData(data1):
 	    for line in data :
 		    x = line.split()
 	return x
+
+# Jawaban
+# --------
+sensor =  ['I', 'and', 'The', 'you']
+tersensor = ['*' * len(kata) if kata in sensor else kata for kata in readData(data1)]
+print(' '.join(tersensor))
\ No newline at end of file
diff --git a/DataLatihan/answer2.py b/DataLatihan/answer2.py
index 5d28fd2..3c1cbe8 100644
--- a/DataLatihan/answer2.py
+++ b/DataLatihan/answer2.py
@@ -6,4 +6,9 @@ def readData(data1):
 	with open(data1) as data :
 	    for line in data :
 		    x = line.split()
-return x
+	return x
+
+# Jawaban
+# --------
+hasil = [kata for kata in readData(data1) if kata in readData(data2)] # menghasilkan list berisi kata yang sama
+for kata in set(hasil): print(kata, hasil.count(kata)) # output hasil
diff --git a/Pertemuan 3 ( Stack & Queue )/Tugas/stack.py b/Pertemuan 3 ( Stack & Queue )/Tugas/stack.py
new file mode 100644
index 0000000..f3554da
--- /dev/null
+++ b/Pertemuan 3 ( Stack & Queue )/Tugas/stack.py	
@@ -0,0 +1,37 @@
+
+class Stack:
+
+     def __init__(self):
+          self.items = []  
+     def isEmpty(self):
+          return self.items == []  
+     def push(self, item):
+          self.items.append(item)  
+     def pop(self):
+          return self.items.pop()  
+     def peek(self):
+          return self.items[len(self.items)-1]  
+     def size(self):
+          return len(self.items)
+
+
+s = Stack()
+
+str_input = "Isd(ff)(f (a)(d)d)";
+n = 0;
+
+for x in str_input:
+     if (x == "("):
+          s.push(x)
+     elif (x == ")"):
+          if (s.isEmpty()):
+               break
+          else:
+               s.pop()
+     n += 1
+
+if (s.isEmpty() and n == len(str_input)):
+     print(str_input, "is VALID")
+else:
+     print(str_input, "is NOT VALID")
+