Given two strings S1 and S2, S = S1 - S2 is defined to be the remaining string after taking all the characters in S2 from S1. Your task is simply to calculate S1 - S2 for any given strings. However, it might not be that simple to do it fast.
Each input file contains one test case. Each case consists of two lines which gives S1 and S2, respectively. The string lengths of both strings are no more than 104. It is guaranteed that all the characters are visible ASCII codes and white space, and a new line character signals the end of a string.
For each test case, print S1 - S2 in one line.
They are students. aeiou
Thy r stdnts.
扫描二维码,关注牛客网
下载牛客APP,随时随地刷题
扫一扫,把题目装进口袋
扫描二维码,进入QQ群
扫描二维码,关注牛客公众号