#include <bits/stdc++.h>
using namespace std;
#define int long long
typedef pair<int,int> P;
int INF = 1e18;
int mod = 1e9+7;
int dx[4] = {1, 0, -1, 0};
int dy[4] = {0, 1, 0, -1};
signed main() {
    string S;
    cin >> S;
    string T = "abcdefghijklmnopqrstuvwxyz";
    for(int i = 0; i < S.size(); i++) {
        if(S[i] != T[i]) {
            cout << T[i] << "to" << S[i] << endl;
        }
    }
}