hdoj2012

#include<iostream>
int main()
{
    using namespace std;
    int x, y;
    while (cin >> x >> y && (x!=0 || y!=0))
    {
        int k = 1;
        for (int i = x; i <= y; i++)
        {
            int a = i * i + i + 41;
            for (int j = 2; j <= a/2; j++)
            {
                if(a/j*j == a){
                    k = 0;
                    break;
                } 
            }
            if (k == 0) break;
            
        }
        if(k) cout << "OK\n";
        else cout << "Sorry\n";
    }
    return 0;
 }