#include<bits/stdc++.h>
using namespace std;
int main(){
	string s;
	cin>>s;
	char c;
	cin>>c;
	int p=s.find(c);
	if(p==-1) cout<<s;
	else{
		while(p!=-1){
			s.erase(p,1);
			p=s.find(c,p);
		}
		cout<<s;
	}
	return 0;
}

/**************************************************************
	Problem: 1131
	User: zhangziang
	Language: C++
	Result: Accepted
	Time:14 ms
	Memory:2076 kb
****************************************************************/