#!/usr/bin/env python3
# @EXPECTED_RESULTS@: RUN_TIME_ERROR, WRONG_ANSWER
a,b,c = [int(i) for i in input().split()]
r = max(0,(b+c-a)//a)
while input() != "end":
    print(["buy","self","airline"][abs(r+1)-abs(r-1)])
    r -= 1