#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n,t,c,k;
    cin>>t;
    while(t--)
    {
        int a,b;
        cin>>a>>b;
        int ab = a+b;
        int a1 = a/10;
        int a2 = a%10;
        int b1 = b/10;
        int b2 = b%10;
        int aa1 = (a1*10)+b1;
        int aa4 = (a2*10)+b2;
        int s1 = aa1+aa4;
        int aa2 = (a1*10)+b2;
        int aa3 = (a2*10)+b1;
        int s2 = aa2+aa3;
        int bb1 = (b1*10)+a1;
        int bb4 = (b2*10)+a2;
        int s3 = bb1+bb4;
        int bb2 = (b1*10)+a2;
        int bb3 = (b2*10)+a1;
        int s4 = bb2+bb3;
        cout<<max({ab,s1,s2,s3,s4})<<endl;
    }
}