Description

Find the difference between two large positive integers.

Input Format

There are 2 lines of input: the first line is the minuend a, and the second line is the subtrahend b (where a > b).
Each large integer does not exceed 200 digits and will not have extra leading zeros.

Output Format

A single line containing the resulting difference.

9999999999999999999999999999999999999
9999999999999

9999999999999999999999990000000000000