#include
#include
#include
#include
#include
using namespace std;
int main()
{
int t;
cin >> t;
while (t--)
{
int a, b;
cin >> a >> b;
if (a % 10 == 0 && b % 10 == 0)
cout << a + b << "\n";
else if (a < 10 && b < 10)
cout << a + b << "\n";
else if (a < 10 || b < 10)
{
if (a < 10 && a>(b / 10))
{
int multi = a;
int num = 0;
num = b % 10;
a = b / 10;
b = multi * 10 + num;
}
else if (b<10 && b>(a / 10))
{
int num = 0;
int multi = b;
num = a % 10;
b = a / 10;
a = b * 10 + num;
}
//cout << a << " " << b << endl;
cout << a + b << "\n";
}
else if (a / 10 == b / 10)
{
// cout<<"work"<<"\n";
if (a < b)
{
int la = 0, fa = 0, lb = 0, fb = 0;
la = a % 10;
fa = a / 10;
lb = b % 10;
fb = b / 10;
a = lb * 10 + la;
b = fb * 10 + fa;
// cout<<a<<" "<<b<<"\n";
cout << a + b << "\n";
}
else if (b =< a)
{
int la = 0, fa = 0, lb = 0, fb = 0;
la = a % 10;
fa = a / 10;
lb = b % 10;
fb = b / 10;
b = la * 10 + lb;
a = fa * 10 + fb;
// cout<<a<<" "<<b<<"\n";
cout << a + b << "\n";
}
else
{
// cout<<a<<" "<<b<<"\n";
cout << a + b << "\n";
}
}
else
{
int la = 0, fa = 0, lb = 0, fb = 0;
la = a % 10;
fa = a / 10;
lb = b % 10;
fb = b / 10;
if (fa < lb)
swap(fa, lb);
else if (fb < la)
swap(fb, la);
int ansa = fa * 10 + la;
int ansb = fb * 10 + lb;
cout << ansa + ansb << "\n";
}
}
}