Isomorphic Strings

easy
1. You are given two strings s1 and s2.
2. You have to determine if they are isomorphic or not.
3. Two strings are called isomorphic if -
   -> Every character of s1 can be mapped with characters of s2.
   -> A character of s1 can be mapped to only one character.
   -> All occurrences of a character must be replaced with another character while preserving the order of characters.

Note -> Length of s1 is equal to the length of s2.

Input Format

Two strings s1 and s2

Output Format

true/false

Constraints

1 <= length of strings <= 1000

Example

Input
pepcoding
sosherlok
Output
false
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