#include<stdio.h>
int main(void)
{
    int a,b;
    scanf("%d %d",&a,&b);
    double A=(double)a;
    double B=(double)b;
    if(A>(B*3.6))
        puts("KoD");
    else if(A<(B*3.6)) 
        puts("blackyuki");
    else
        puts("same");
    return 0;
}