Solution

#include "bits/stdc++.h"
using namespace std;

// BeginCodeSnip{{USACO-style I/O. See General / Input & Output}}
void setIO(string name = "") {
	cin.tie(0)->sync_with_stdio(0);
	if ((int)name.size()) {
		freopen((name + ".in").c_str(), "r", stdin);
		freopen((name + ".out").c_str(), "w", stdout);
	}
}
// EndCodeSnip

int main() {
	string s;
	string t;
	cin >> s >> t;

	string censored;
	// Add each character to the censored string
	for (int i = 0; i < s.size(); i++) {
		censored += s[i];
		// If the end of the string is t, we remove t from the end
		if (censored.size() > t.size() &&
		    censored.substr(censored.size() - t.size()) == t) {
			censored.resize(censored.size() - t.size());
		}
	}
	cout << censored << endl;
}