#include <stdio.h>

#include <unistd.h>

char	*ft_strlowcase(char *str)
{
	int	i;

	i = 0;
	while (str[i] != '\\0')
	{
		if (str[i] >= 'A' && str[i] <= 'Z')
		{
			str[i] = str[i] + ('a' - 'A');
		}
		i++;
	}
	return (str);
}
int main() {
    char a[] = "ABCdefGHI";
    
    printf("%s", ft_strlowcase(a));
    
    return 0;
}