Write an O(N) running function that returns true if:

• Every element of string A are all elements of string B
• Every element of string B are all elements of string A

Expected Output:

• contains(‘abcd’, ‘abcd’); // true
• contains(‘abcd’, ‘abcdd’); // true
• contains(‘abcdd’, ‘abcd’); // true
• contains(‘abcd’, ‘cdab’); // true
• contains(‘abcd’, ‘jkslsd’); // false
• contains(‘decbae’, ‘abcd’); // true
• contains(‘ccccbaaad’, ‘accee’); // false

Guaranteed Inputs:

• { a, ..., z, A, ..., Z }

Proposed Solution: https://repl.it/KZ3i/1