You are given a lowercase string and an array of lowercase characters as arguments. Return the number of additional characters that would need to be added to the array of characters to form the string.

The array of characters will never include characters that are not found in the argument string.

Requirements

• Must return a single integer

Example #1

solve("terminal", ["t", "m", "l")
> 5

The array of characters would need five more characters, "e", "r", "i", "n", "a" to match the argument string, so we return the number 5.

Example #2

solve("test", ["t", "s", "t")
> 1

The array of characters would need one more character, "e", to match the argument string, so we return the number 1.