/*
1391 Number Steps
Time Limit : 1000 ms  Memory Limit : 32768 K  Output Limit : 256 K

GUN C++
*/
#include <iostream.h>
using namespace std;

int main()
{
    int t,x,y,ca,sec,ans;
    cin>>t;
    for(ca=0;ca<t;ca++)
    {
        cin>>x>>y;
        ans=-1;
        if( (x==y) || (x==y+2) )
        {
            if( x%2==0 && y%2==0 )
                ans=x+y;
            else
                ans=x+y-1;
        }
            
        if(ans<0)
            cout<<"No Number\n";
        else
            cout<<ans<<endl;
    }
    return 0;
}