删减
#include<bits/stdc++.h>
using namespace std ;
typedef long long ll ;
const int mod = 1e9+ 7 ;
string s1 , s2 , s3 ;
int main( )
{
cin >> s1 >> s2 ;
int l = s2.size( ) ;
for( int i = 0 ; i < s1.size( ) ; i++ )
{
s3 += s1[i];
if(s3.size() >= l && s3. substr(s3.size() - l,l) == s2)
{
s3.erase(s3.size() - l , l);
}
}
cout << s3 << endl ;
return 0 ;
}
