#include <unistd.h>

void	ft_putnbr2(char n)
{
	char d;
    char u;

    d = n / 10 + '0';
    u = n % 10 + '0';
    write(1, &d, 1);
    write(1, &u, 1);
}

void	ft_print_comb2(void)
{
	int	a;
	int	b;

	a = 0;

	while (a <= 98 )
	{
        b = a + 1;
        while(b <= 99)
        {
            ft_putnbr2(a);
            write(1, " ", 1);
            ft_putnbr2(b);
            if (!(a == 98 && b == 99))
            {
                write(1, ", ", 2);
            }
            b++;
        }
        
        a++;
	}
}

int	main(void)
{
	ft_print_comb2();
	return (0);
}