#include <bits/stdc++.h>
using namespace std;
#define FOR(i,a,b) for(int i=a;i<b;i++)
#define REP(i,b) FOR(i,0,b)
#define INF 1e9

using ll = long long;
const ll mod = LLONG_MAX;

int main() {
  string S;
  cin>>S;

  if(S.size()!=3){
    S = S+"ham";
  }

  cout<<S;

  return 0;
}