#include <bits/stdc++.h>
using namespace std;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
	int n,k;
    cin >> n>>k;
    int mini = 1e9,maxi = -1,ans1=0,ans2 = 0;
    int temp;
    for(int i = 0;i < n;i++){
        cin >> temp;
        if(mini > temp){
            mini = temp;
            ans1 = i+1;
        }
    }
    for(int i = 0;i < k;i++){
        cin >> temp;
        if(temp > maxi){
            maxi =temp;
            ans2 = i+1;
        }
        }
    if(maxi >= mini){
        cout << "NEM\n"<<ans1<<"\n" << ans2;
    }else cout << "IGEN";
}