#include <iostream>
#include <cstdlib>
using namespace std;

int main()
{
    long long a,b,sa=0,sb=0,p,c=0;
    for (int i=0;i<5;i++){
        cin>>a>>b;
        if (a<(b/2)) c++;
        sa+=a;
        sb+=b;
    }
    p=(sa*100)/sb;
    if (c>=1) cout <<"Fail";
else if (p>=85) cout <<"Excellence";
    else if (p>=75) cout <<"Very Good";
    else if (p>=65) cout <<"Good";
    else if (p>=55) cout <<"Fair";
        else if (p>=50) cout <<"Weak";
    else if (p<50) cout <<"Fail";

    return 0;
}