from math import sqrt,ceil,gcd,log;re=lambda:map(int,input().strip().split())
n, = re()
print("wbt" if (n & 1) or n <= 50 else "wpm")

#include <stdio.h> int main() { int n; scanf("%d",&n); if (n>50&&n%2==0){ printf("wpm"); }else { printf("wbt"); } return 0;

}