#include<iostream>
using namespace std;
int main()
{
int cases;
for(cin>>cases;cases>0;cases--)
{
int x,y;
cin>>x>>y;
if((x%2==0) && (y%2==0))
{
if(x>=y)
cout<<x+y<<endl;
else
cout<<"No Number";
}
else if((x%2!=0) && (y%2!=0))
{
if(x>=y)
cout<<((x+y)-1)<<endl;
else
cout<<"No Number";
}
else
cout<<"No Number";
}
return 0;
}