Check if string B can be formed using letters from string A, where each letter in A can be used at most once.

Examples

Example 1

Input:  A = "aab", B = "ab"
Output: true

Can use 1 'a' and 1 'b' from A to form B

Example 2

Input:  A = "ab", B = "aab"
Output: false

Need 2 'a's but A only has 1 'a'

Constraints

• Both strings can be empty
• Case-sensitive matching