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


int main() {
	string S; cin >> S;
	string al = "abcdefghijklmnopqrstuvwxyz";

	rep(i, 26) if (al[i] != S[i]) cout << al[i] << "to" << S[i] << endl;

	return 0;
}