#!/usr/bin/python3
import itertools
N,K=map(int,input().split())
l=input().split()
mx=max(list(map(lambda x:int(x[0]),l)))
def sort_weight(_n):
    if len(_n)==2:
        return float(_n)
    if len(_n)==1:
        return float(_n)*10+mx+0.5
l2=sorted(l, key=sort_weight,reverse=True)
count=0
for i in itertools.permutations(l2):
    print("".join(i))
    count=count+1
    if count==K:
        break