#include<cstdio>
#include<iostream>
using namespace std;
 
int main()
{
    int a,b;
    while(cin>>a>>b)
    {
        if(a<=0&&b>=0)
            cout<<"Zero"<<endl;
        else if(a<0)
        {
            int key=b-a;
            if(key%2!=0)
                cout<<"Positive"<<endl;
            else
                cout<<"Negative"<<endl;
        }
        else
            cout<<"Positive"<<endl;
    }
}
