#include <iostream>
using namespace std;
int main(){
float panjang, lebar;
cin >> panjang;
cin >> lebar;
if (panjang >= 98 && panjang <= 102 &&
lebar >= 49 && lebar <= 51) {
cout << "Produk OK";
}
else {
cout << "Produk NG";
}
}
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