#include<fstream>
using namespace std;
int n, i, j, k;
ifstream fin("tije.in");
ofstream fout("tije.out");
int main(){
    fin>> n;
    for(i = n - 1; i >= 1; i--){
        for(j = 1; j <= n + 1; j++){
            for(k = 1; k <= i; k++){
                fout<< j <<" ";
                if(j == 1){
                    fout<< n + 1 <<"\n";
                }
                else{
                    fout<< j - 1 <<"\n";
                }
            }
        }
    }
    return 0;
}