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+#!/usr/bin/env python
+
+# Challenge 092
+#
+# TASK #1 > Isomorphic Strings
+# Submitted by: Mohammad S Anwar
+# You are given two strings $A and $B.
+#
+# Write a script to check if the given strings are Isomorphic. Print 1 if they
+# are otherwise 0.
+#
+# Example 1:
+# Input: $A = "abc"; $B = "xyz"
+# Output: 1
+# Example 2:
+# Input: $A = "abb"; $B = "xyy"
+# Output: 1
+# Example 3:
+# Input: $A = "sum"; $B = "add"
+# Output: 0
+
+import sys
+
+def isomorphic(a,b):
+    if len(a)!=len(b):
+        return 0
+    else:
+        mapping = {}
+        mapped = {}
+        for i in range(0, len(a)):
+            if not a[i] in mapping:         # a is new
+                if b[i] in mapped:          # b already mapped to some other a
+                    return 0
+                else:                       # store mapping
+                    mapping[a[i]] = b[i]
+                    mapped[b[i]] = 1
+            else:                           # a already occurred
+                if mapping[a[i]]!=b[i]:     # previous mapping is different
+                    return 0
+        return 1
+
+print(isomorphic(sys.argv[1], sys.argv[2]))