#include<bits/stdc++.h>
using namespace std;
int main(){
    long long n,x,y,l = -200000000000, r = 200000000000;
    scanf("%d%d",&n,&x);
    for(int i = 2; i <= n;i++){
        scanf("%d",&y);
        if (x == y){
            l = 200000000000, r = -200000000000;
        }
        if (x <= y){
            r = min(r, x + y);
        }
        else{
            l = max(l, x + y);
        }
        x = y;
    }
    if (l >= r) cout << "pigeon";
    else printf("lovely\n%.10lf",(l + r) * 0.25);
    return 0;
}