finished after pranav helped

rot13.py

@@ -0,0 +1,21 @@
+letters = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x' ,'y', 'z']
+def rotate_word(word,n):
+        l = ""
+        for letter in word:
+                rot = ord(letter) + n
+                if rot > ord('z'):
+                        rot = rot % ord('a') - 27
+
+                elif rot < ord('a'):
+                        rot = rot % ord('a') - 97
+
+                else:
+                        rot = rot % ord('a')
+
+
+                #print rot
+                l = l + letters[(+rot)%26]
+                rot = 0
+        return l
+#print letters[ord('m') % 97]
+print rotate_word("ceaser",13)