#include <iostream>
#include <stdio.h>
using namespace std;
FILE *f,*g;
int n,S[30];
int F[30];
void back(int k)
{
    int i,j,t;
    if(k==n)
    {
        for(i=1;i<=n;++i)
			fprintf(g,"%d ",S[i]);
		fprintf(g,"\n");
    }
    else
        for(i=1;i<=n;++i)
		{
			S[k+1]=i;
			t=1;
			if (F[i]==1)
				t=0;
            if(t==1)
			{
				++F[i];
				back(k+1);
				--F[i];
			}
        }
}



int main()
{
	f=fopen("permutari.in","r");
	g=fopen("permutari.out","w");
	fscanf(f,"%d",&n);
	back(0);
	fclose(f);
	fclose(g);
    return 0;
}