#include <stdio.h>

int main()
{
	char a,b,c;

	for(a='A';a<='Z';a=a+1)
		for(b='A';b<='Z';b=b+1)
			for(c='A';c<='Z';c=c+1)
				printf("%c%c%c\t",a,b,c);
	return(0);
}