#include <iostream>
#include <cstdio>
using namespace std;
int rev(int n) {
int r=0;
while( n ) {
r=r*10+(n%10);
n/=10;
}
return r;
}
int main() {
int t,n1,n2;
scanf("%d",&t);
while(t--) {
scanf("%d%d",&n1,&n2);
printf("%d\n",rev(rev(n1)+rev(n2)));
}
return 0;
}
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