#include <iostream>
 using namespace std;

 int main()
{
    int C,i=1,R1=0,R2=0 ,N1,N2,sum,rev=0;
    cin>> C;
    while(i>C)
  {

      cin>>N1>>N2;
      while(N1!=0)
      {
          R1=R1*10;
          R1=R1+N1%10;
          N1=N1/10;
      }
      while(N2!=0)
      {
          R2=R2*10;
          R2=R2+N2%10;
          N2=N2/10;
      }
      sum=R1+R2;
      while(sum!=0)
      {
          rev=rev*10;
          rev=rev+sum%10;
          sum=sum/10;
      }
      cout<<endl<<rev;
      i++;
}
return 0;