#include<bits/stdc++.h>
using namespace std;
int main(){
	freopen("print.in","r",stdin);
    freopen("print.out","w",stdout);
	int a;
	char b;
	cin>>a>>b;
	for(int i=1;i<=a;i++){
		for(int j=1;j<=i;j++){
			cout<<b;
		}
		cout<<endl;
	}
	return 0;
}