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