Censor
frog is now a editor to censor so-called sensitive words (敏感词).
She has a long text p. Her job is relatively simple -- just to find the first occurence of sensitive word w and remove it.
frog repeats over and over again. Help her do the tedious work.
Input
The input consists of multiple tests. For each test:
The first line contains 1 string w. The second line contains 1 string p.
(1≤length of w,p≤5⋅106, w,p consists of only lowercase letter)
Output
For each test, write 1 string which denotes the censored text.
Sample Input
abc
aaabcbc
b
bbb
abc
ab
Sample Output
a
ab
//以上是题目，本人英语差，看到题目后，感觉题目要求是：给出一个敏感字符串A，然后在输入一个字符串B，在B中如果包含A串，就删去，
但是Sample Input
abc
aaabcbc
b
bbb
abc
ab
Sample Output
a
ab
他给的这个示例输入和输出是什么意思啊，看不懂，
希望大牛能够解答，感激不尽，
