def bingo(numbers: list) -> str:
  bingo_set = set([2, 9, 14, 7, 15])
  if bingo_set.issubset(set(numbers)):
    return "WIN"
  else:
    return "LOSE"

assert bingo([21,13,2,7,5,14,7,15,9,10]) == "WIN"
assert bingo([1,2,3,4,5,6,7,8,9,10]) == "LOSE