#include "stdio.h"
#include "math.h"

main()
{
	int i, counter, t;
	long int a, b;
	while (scanf ("%ld %ld", &a, &b)&&(a||b))
	{
		t=0;
		counter=0;
		for (i=0; i<10; i++)
		{
			if (a/(int)(pow(10,i))%10+b/(int)(pow(10,i))%10+t>9)
			{
				counter++;
				t=1;
			}
			else
			{
				t=0;
			}
		}
		if (counter)
		{
			if (counter>1)
			{
				printf ("%d carry operations.\n", counter);
			}
			else
			{
				printf ("1 carry operation.\n");
			}
		}
		else
		{
			printf ("No carry operation.\n");
		}
	}
}