#include <stdio.h>
 
int main( void )
{
    char let = 'F';
    char start;
    char end;
    
    for (end = let; end >= 'A'; end--)
    {
        for (start = let; start >= end; start--)
            printf("%c", start);
        printf("\n");
    }
    
    return 0;
}