#include <stdio.h>
long int reverse(long int n)
{
	long int ans=0;
	if(n==0)
  {
    return 0;
  }
	while(n>0)
	{
		ans = ans*10+(n%10);
		n = n/10;
	}
	return ans;
}
int main(void) {
	int n;
  long int a,b,s;
	scanf("%d",&n);
	for(int i=0;i<n;i++)
	{
		scanf("%ld%ld",&a,&b);
    s=reverse(a)+reverse(b);
		printf("%ld\n",reverse(s));
	}
	return 0;
}