include <bits/stdc++.h>

define ll long long int

define ld long double

using namespace std; int main(){

ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
ll n, m;
cin>>n>>m;
n/=m;
if(n>=3){
    cout<<"Cheated";
}
else{
    cout<<"Done by himself";
}

} //TECHNOBLADE NEVER DIES