#include<iostream> #include<cstring> using namespace std; int main() { char a[1001]; cin >> a; int d; d = strlen(a); char b, c; cin >> b >> c; for (int i = 0; i <= d; i++) { if (a[i] == b) { a[i] = c; } } for (int i =0; i <= d; i++) { cout << a[i]; } }