황소개발자

n, m = map(int, input().split()) num_list = list(map(int, input().split())) num_list.sort() a = [0 for i in range(m)] c = [False for i in range(n)] def go(idx, n, m): if idx == m: print(' '.join(map(str, a))) return for i in range(n): a[idx] = num_list[i] go(idx + 1, n, m) # a[selected] = num_list[idx] # go(idx, selected + 1, n, m) # a[selected] = 0 # go(idx + 1, selected, n, m) go(0, n, m)