#include <iostream>
using namespace std;

int main() {
    int n=4;
    
    int num=1;
    for(int i=0;i<n;i++){
        //spaces
        for(int j=0;j<i;j++){//backwards floyd'ss triangle
            cout<<" ";
        }

        //nums
        for(int j=0;j<n-i;j++){
            cout<<(i+1);
        }
        cout<<endl;
    }
    
    return 0;
}