#include<iostream.h>
int main()
{
    int N,x,y,p;
    cin>>N;
    for(int i=1;i<=N;i++)
    {
        cin>>x>>y;
        if(x==y)
        {
            if(x%2==0)
              p=2*x;
            else
              p=2*x+1;
            cout<<p<<endl;
        }
        else if((x-y)==2&&x>=2)
        {
            if(x%2==0)
                p=2*x-2;
            else
                p=2*x-3;
            cout<<p<<endl;
        }
        else
         cout<<"No Number"<<endl;
        
    }
    return 0;
}