#include <iostream>
using namespace std;

int main() {
    int n;cin>>n;
    char a,b,c,d;cin>>a>>b>>c>>d;
    string s;cin>>s;
    while(s.find(a) != -1) s[s.find(a)] = b;
    while(s.find(c) != -1) s[s.find(c)] = d;
    cout<<s<<endl;
}
// 64 位输出请用 printf("%lld")