#include <iostream>
#include <algorithm>
#include <vector>
#include <random>
using namespace std;

random_device rnd;

int M;
int output_counter = 0;

void output(int num){
    output_counter++;
    if(output_counter == M){
        cout << num << endl;
    }else{
        cout << num << " ";
    }
}

int main(){
    int N;
    cin >> N >> M;
    int nums[N];
    for(int i = 0; i < N; i++){
        cin >> nums[i];
    }
    sort(nums, nums + N);
    output(nums[N - 1]);
    int ans = nums[N - 1];
    nums[N - 1] = 1e9;
    for(int i = 0; i < N - 1 && output_counter < M; i++){
        if((ans ^ nums[i]) > ans){
            output(nums[i]);
            ans ^= nums[i];
            nums[i] = 1e9;
        }
    }
    sort(nums, nums + N);
    for(int i = 0; i < M - output_counter; i++){
        output(nums[i]);
    }
}