Given two strings
t, determine if they are isomorphic.
t are isomorphic if the characters in
s can be replaced to get
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.
Input: s = "egg", t = "add" Output: true
Input: s = "foo", t = "bar" Output: false
Input: s = "paper", t = "title" Output: true
1 <= s.length <= 5 * 104
t.length == s.length
tconsist of any valid ascii character.