#include <stdio.h>

unsigned long reverseInteger(unsigned long n) {
	unsigned long result = 0, t;

	while(n) {
		t = n % 10;
		result = result * 10 + t;
		n /= 10;
	}

	return result;
}

int main(void) {
	unsigned int t;
	unsigned long a, b;

	scanf("%d", &t);

	while(t--) {
		scanf("%lu %lu", &a, &b);
		printf("%lu\n", reverseInteger(reverseInteger(a) + reverseInteger(b)));
	}

	return 0;
}