Two strings, X and Y , are called isomorphic if all occurrences of each character in X can be replaced with another character to get Y and vice-versa. For example, consider strings ACAB and XCXY . They are isomorphic as we can map 'A' —> 'X' , 'B' —> 'Y' and 'C' —> 'C' .

What is isomorphism string?

Two strings are isomorphic if the characters in s can be replaced to get t. All occurrences of a character must be replaced with another character while preserving the order of characters. No two characters may map to the same character but a character may map to itself.

How do you know if two strings are isomorphic?

Two strings str1 and str2 are called isomorphic if there is a one-to-one mapping possible for every character of str1 to every character of str2. And all occurrences of every character in 'str1' map to the same character in 'str2'.