#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int,int>;
const int N = 1e6+10;
int t,n,m,k,l,r,op,x,y;
int f[N];
string str;
const string st = "EASY";
void solve(){
    while(cin>>str){
        m = 0;
        for(char ch:str){
            if(ch==st[m]){
                m++;
            }
            if(m==(int)st.size()){
                break;
            }
        }
        if(m==(int)st.size()){
            cout<<"easy";
        }else{
            cout<<"difficult";
        }
        cout<<"\n";


    }
}
int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);  
    solve();
    return 0;
}