#include<bits/stdc++.h>
#define rep(i,n) for(ll i=0;i<ll(n);i++)
#define reps(i,n) for(ll i=1;i<ll(n);i++)
#define rrep(i,n) for(ll i=ll(n);i>=0;i--)
#define len(x) x.length()//配列の長さ
#define NPOS string::npos//findで検索失敗した場合の戻り値
typedef long long ll;
using namespace std;
ll ans=0;
ll gcd(ll a, ll b) {if (b==0) return a;else return gcd(b, a%b);}//最大公約数
ll lcm(ll a, ll b) {return a * b / gcd(a, b);}//最小公倍数
ll digit_sum(ll a,ll b){ll ans=0;while(a>0){ans+=a%b;a/=b;}return ans;}//n進桁和
ll digit_num(ll a,ll b){ll ans=0;while(a>0){ans++;a/=b;}return ans;}//n進桁数
ll fact(ll n){if(n==1)return 1;else return n*fact(n-1);}//階乗
ll array_sum(ll *a,ll n){ll ans=0;rep(i,n){ans+=a[i];}return ans;}//配列総和
ll combi(ll n, ll k){if(n==k||k==0){return 1;}else{return combi(n-1,k-1)+combi(n-1,k);}}//nCkの組み合わせ


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