#include <stdio.h>
#include <stdlib.h>
#include <time.h>

main()
{
	srand((unsigned) time(NULL));
	
	int i, j, alpha[20];
	
	for(i=0; i<=19; i++)
		alpha[i] = rand() % 26 + 65 + 32 * (rand() % 2);
	
	for(i=0; i<=19; i++)
		printf("%c", alpha[i]);
	
	printf("\n");
	
	for(i=0; i<=19; i++)
		printf("%c", alpha[i]+32*(1-2*(alpha[i]/95)));
		
	printf("\n");
	
	return(0);
}