#include <bits/stdc++.h>
using namespace std;
#define rep(i,l,r) for(int i=(l);i<(r);++i)
typedef long long ll;

int main(){
	string s; cin>>s;
	string r="abcdefghijklmnopqrstuvwxyz";
	rep(i,0,26){
		if(s[i]!=r[i]) cout<<r[i]<<"to"<<s[i]<<endl;
	}
}