#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define modulo 1000000007
#define mod(mod_x) ((((long long)mod_x+modulo))%modulo)
#define Inf 1000000000000000000	

int main(){

	string correct = "abcdefghijklmnopqrstuvwxyz";
	string S;
	cin>>S;
	
	for(int i=0;i<26;i++){
		if(S[i]!=correct[i]){
			cout<<correct[i]<<"to"<<S[i]<<endl;
		}
	}
	
	return 0;
}