#include <cstdio>

using namespace std;

int n,x[16];

void print()
{
    for(int i=1;i<=n;++i)
        printf("%d ",x[i]);
    printf("\n");
}

int valid(int k)
{
    for(int i=1;i<k;++i)
        if(x[k]==x[i])
            return 0;
    return 1;
}

void backtracking(int k)
{
    for(int i=1;i<=n;++i)
    {
        x[k]=i;
        if(valid(k))
        {
            if(k==n)
                print();
            else
                backtracking(k+1);
        }
    }
}

int main()
{
    freopen("permutari.in","r",stdin);
    freopen("permutari.out","w",stdout);
    backtracking(1);
    return 0;
}