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#include <cstdio>
#include <vector>
#include <algorithm>
#include <stack>
using namespace std;
vector<int> cards;
int power2[] = {1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072, 262144, 524288, 1048576};
int main(){
    int n, t;
    scanf("%d%d", &n, &t);
    for(int i = 0; i < power2[n]; i++){
        int a;
        scanf("%d", &a);
        cards.push_back(a);
    }
    if(t%2==1){
        for(int i = 0; i < power2[n]; i+=2){
            printf("%d %d ", cards[i+1], cards[i]);
        }
    }
    else{
        for(int i = 0; i < power2[n]; i+=2){
            printf("%d %d ", cards[i], cards[i+1]);
        }
    }
    
}