#include<stdio.h>
int main()
{
	int m,n,tmp,count;
	while(scanf("%d%d",&m,&n),m||n)
	{
		
		for(count=tmp=0;m||n;m/=10,n/=10)
		{
			tmp+=m%10+n%10;
			if(tmp>9)
				count++;
			tmp/=10;
		}
		if(count)
		{
			printf("%d carry ",count);
			puts(count>1?"operations.":"operation.");
		}
		else
			puts("No carry operation.");
	}
	return 0;
}