#include <iostream>
#include <sstream> // 有stringstream 需要放

using namespace std;

int main()
{
    string s, a, b, c;
    getline(cin, s);

    cin >> a >> b;

    stringstream ssin(s); // 将读入的stream流转换成stringstream对象：ssin
    while(ssin >> c) // ssin的读入同cin
        if(c == a) cout << b << " ";
        else cout << c << " ";

    return 0;
}