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

int main()
{
    string s;
    getline(cin, s);
    vector<string> vec;
    for (int i = 0; ; ++ i)
    {
        string word;
        while (s[i] != ' ' && i < s.size())
        {
            word += s[i];
            i ++;
        }
        vec.push_back(word);
        if (i >= s.size()) break;
    }
    string a, b;
    cin >> a >> b;
    for (vector<string>::iterator it = vec.begin(); it != vec.end(); ++ it)
    {
        if (it == vec.begin())
        {
            if (*it == a) cout << b;
            else cout << *it;
        }
        else
        {
            if (*it == a) cout << " " << b;
            else cout << " " << *it;
        }
    }
    return 0;
}