#include <bits/stdc++.h>

using namespace std;
int n,i,a[10001],x,b[10001],j,h;
int main()
{
    ifstream f("submultimi.in");
    ofstream g("submultimi.out");

    f>>n;
    for(i=1;i<=n;i++)
    f>>i; a[i]=i;

    for(i=1;i<(1<<n);i++)
    {
        x=i;
        for(j=1;j<=n;j++)
        {
            if(x%2) g<<a[j]<<" ";
            x/=2;
        }
        g<<endl;
    }
    return 0;
}