#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < n; i++)
using namespace std;

typedef long long ll;

ll MOD = 998244353;

int main() {
    string S;
    cin >> S;
    rep(i, 26) {
        if (S[i] != i + 'a') {
            cout << (char)(i + 'a') << "to" << S[i] << "\n";
        }
    }
}