Isomorphic Strings

Two strings are isomorphic if characters in the first can be replaced to get the second with a one-to-one mapping. Return true if they are isomorphic.

Examples
Input: ["egg","add"]
Output: true
Hints

Isomorphic Strings

Two strings are isomorphic if characters in the first can be replaced to get the second with a one-to-one mapping. Return true if they are isomorphic.