For a better world

#include <stdio.h>

int main(void)
{
	int A = 0;
	int B = 0;
	
	while(true)
	{
		scanf("%d %d", &A, &B);	
		if(A == 0 and B == 0)
			break;
			
		printf("%d\n", A+B);
	}
	
	return 0;
	
}