diff --git a/ch1-lab-setup/sample/hosts.ini b/ch1-lab-setup/sample/hosts.ini
index 8a716fa..4a5278c 100644
--- a/ch1-lab-setup/sample/hosts.ini
+++ b/ch1-lab-setup/sample/hosts.ini
@@ -1,2 +1,7 @@
 [linux]
-192.168.100.21
+172.16.44.103
+172.16.44.231
+172.16.44.172
+#192.168.1.7
+#192.168.1.17
+#192.168.1.31
diff --git a/ch2-inventory/inventory/01-ipOnly.ini b/ch2-inventory/inventory/01-ipOnly.ini
index c3b016c..1c9d018 100644
--- a/ch2-inventory/inventory/01-ipOnly.ini
+++ b/ch2-inventory/inventory/01-ipOnly.ini
@@ -1,5 +1,10 @@
+<<<<<<< HEAD
+192.168.1.17
+
+192.168.1.43
+=======
 192.168.100.12
+>>>>>>> 19d7f43fd7619a5c19e29da439623a8e2c21b3df
 
-192.168.100.21
+192.168.1.239
 
-192.168.100.22
diff --git a/ch2-inventory/student-nctin/02-nonFQDN.yml b/ch2-inventory/student-nctin/02-nonFQDN.yml
new file mode 100644
index 0000000..a0a0ba2
--- /dev/null
+++ b/ch2-inventory/student-nctin/02-nonFQDN.yml
@@ -0,0 +1,12 @@
+all:
+ hosts:
+  ubuntu01:
+   ansible_host: 192.168.1.109
+  centos01:
+   ansible_host: 192.168.1.17
+  centos02:
+   ansible_host: 192.168.1.43
+  centos03:
+   ansible_host: 192.168.1.239
+
+
diff --git a/ch2-inventory/student-nctin/03-hostgroups-children.yml b/ch2-inventory/student-nctin/03-hostgroups-children.yml
new file mode 100644
index 0000000..a18be1f
--- /dev/null
+++ b/ch2-inventory/student-nctin/03-hostgroups-children.yml
@@ -0,0 +1,19 @@
+all:
+ hosts:
+  fakehost.local:
+ children:
+  linux:
+   children:
+    ubuntu:
+     hosts:
+      ubuntu:
+       ansible_host: 192.168.1.109
+    centos:
+     hosts:
+      centos1:
+       ansible_host: 192.168.1.17
+      centos2:
+       ansible_host: 192.168.1.43
+      centos3:
+       ansible_host: 192.168.1.239
+