#include <stdio.h>
#include <algorithm>
using namespace std;

int N,K,L,A[202],C[100],U[100],X;

bool good(int a, int r)
{
	if (X < a) X = a;
	if ((L - a) / 2 < r) return false;
	if (a == L) return true;
	if (U[A[a]] < C[A[a]]){
		U[A[a]]++;
		if (good(a+1,r)) return true;
		U[A[a]]--;
	}
	if (a + 2 <= L && A[a]){
		int u = A[a] * 10 + A[a+1];
		if (U[u] < C[u]){
			U[u]++;
			if (good(a+2, r-1)) return true;
			U[u]--;
		}
	}
	return false;
}

int main()
{
#ifdef __LOCAL
	freopen ("input.txt","r",stdin);
#endif

	scanf ("%d %d",&N,&K);
	for (int i=0;i<N;i++){
		int x; scanf ("%d",&x); C[x]++;
		if (x < 10) A[L++] = x;
		else A[L++] = x / 10, A[L++] = x % 10;
	}
	sort(A,A+L);
	reverse(A,A+L);

	int rem = 0;
	for (int i=10;i<100;i++) rem += C[i];

	do{
		for (int i=0;i<100;i++) U[i] = 0;
		X = 0;
		if (good(0,rem)){
			for (int i=0;i<L;i++) printf ("%d",A[i]);
			puts("");
			if (--K == 0) break;
		}
		else{
			if (X + 2 < L) sort(A+X+2,A+L);
		}
	}while(prev_permutation(A,A+L));

	return 0;
}