#include <stdio.h>

int n, m, sol[20];

void scrie()

{
  for (int i = 1; i <= m; ++i) printf("%d ", sol[i]);

  printf("\n");
}

void back(int k)  // completeaza elem de pe poz k din sol

{
  if (k == m + 1)

  {
    scrie();

    return;
  }

  for (int i = 1 + sol[k - 1]; i <= n - m + k; ++i)  // aleg o valoare pt sol[k]

  {
    sol[k] = i;

    back(k + 1);
  }
}

int main()

{
  freopen("submultimi.in", "r", stdin);

  freopen("submultimi.out", "w", stdout);

  scanf("%d", &n);

  for (m = 1; m <= n; m++) back(1);

  return 0;
}