# FIXME: multiple variable assignment in for loop
#
# def is_Isomorphic(str1,str2):          
#     dict_str1 = {}
#     dict_str2 = {}
#     for i, value in enumerate(str1):
#         dict_str1[value] = dict_str1.get(value,[]) + [i]        
#     for j, value in enumerate(str2):
#         dict_str2[value] = dict_str2.get(value,[]) + [j]
#     if sorted(dict_str1.values()) == sorted(dict_str2.values()):
#         return True
#     else:
#         return False