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

int main( )
{
    int a, b, i;
    while( scanf("%d %d", &a, &b) != EOF )
    {
        long long int sum = 1;
        for( i = a; i <= b; i++)
        {
            sum *= i;
        }
        if( sum > 0)
            printf("Positive\n");
        else if( sum == 0 )
            printf("Zero\n");
        else if( sum < 0 )
            printf("negative\n");
    }
    return 0;
}
