#include <stdio.h>
#include <stdlib.h>

int n, sol[10];

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

void Back(int pas)
{
    if(pas > 1)
    {
        print(pas - 1);
    }
    if(pas == n + 1)
    {
        return;
    }
    for(int i = sol[pas - 1] + 1; i <= n; i++)
    {
        sol[pas] = i;
        Back(pas + 1);
    }
}

int main()
{
    FILE *in, *out;
    in = fopen("numere8.in", "r");
    out = fopen("numere8.out", "w");
    scanf("%d", &n);
    Back(1);
    fclose(in);
    fclose(out);
    return 0;
}