using namespace std;int main(){ int n; cin>>n; while(n--) { long long int x,y; cin>>x>>y; if(x-y==1 || x-y== -1 || y>x) { cout<<"No Number"<<endl; } else if(x%2!=0 && y%2!=0) { cout<<(x+y)-1<<endl; } else cout<<x+y<<endl; } return 0;}