from itertools import permutations
N,M = list(map(int,input().split()))
num_list = list(map(int,input().split()))
num_list.sort()
result = list(permutations(num_list,M))
result_set = set(result)
result = list(result_set)
result.sort()
for tmp in result:
tmp_string = ""
for i in range(len(tmp)):
tmp_string+=str(tmp[i])+" "
print(tmp_string)