#include <stdio.h>
int main()
{
    char ch;
    scanf("%c", &ch);    
    int num = ch;     
        int i,j;        
        for(j=65; j<=num; j++) 
        {
            for(int k=num-j; k>0; k-- )  
            {
                printf(" ");
            }            
            for(i=65; i<=j; i++) 
            {
                printf("%c",i);    
            }              
            for(i=j-1; i>=65; i--) 
            {
                printf("%c",i);
            }
            
            printf("\n");
        }
    return 0;
}