#include<stdio.h>
int main()
{
	int i, j, d;
	for (d = 0; d < 25; d++)
	{
		if (d == 0 || d == 1)
		{
			for (i = 0;;)
			{
				j = (i + 2) % 26;
				printf("%c%c\n", 'A' + i, 'A' + j);
				if (j == 0 || j == 1)
					break;
				i = j;
			}
		}
		if (d == 0 || d == 12)
		{
			for (i = 0;;)
			{
				j = (i + 13) % 26;
				printf("%c%c\n", 'A' + i, 'A' + j);
				if (j == 0 || j == 12)
					break;
				i = j;
			}
		}
		printf("%c%c\n%c%c\n", 'A' + d, 'A' + d, 'A' + d, 'B' + d);
	}
	printf("ZZ\nZA\n");
	for (d = 2; d < 26; d++)
	{
		if (26 % d == 0)
			continue;
		for (i = 0;;)
		{
			j = (i + d) % 26;
			printf("%c%c\n", 'A' + i, 'A' + j);
			if (j == 0)
				break;
			i = j;
		}
	}
	return 0;
}