#include<cstdio>
#include<iostream>
using namespace std;

int main(){
    char ch;
    cin>>ch;
    for(char i='A';i<=ch;i++){
        for(int j=1;j<=ch-i;j++)printf(" ");
        for(int j='A';j<=i;j++)printf("%c",j);
        for(int j=i-1;j>='A';j--)printf("%c",j);
        printf("\n");
    }
    return 0;
}