#include<fstream>
#include<cstdio>
using namespace std;
int n, i, j, k;
FILE * fin = fopen("tije.in", "r");
FILE * fout = fopen("tije.out", "w");
int main(){
    fscanf(fin, "%d", &n);
    for(i = n - 1; i >= 1; i--){
        for(j = 1; j <= n + 1; j++){
            for(k = 1; k <= i; k++){
                fprintf(fout, "%d ", j);
                if(j == 1){
                    fprintf(fout, "%d\n", n + 1);
                }
                else{
                    fprintf(fout, "%d\n", j - 1);
                }
            }
        }
    }
    return 0;
}