#include<iostream>
using namespace std;
int t,a,b;
int main()
{
    cin>>t;
    while(t--)
    {
        cin>>a>>b;
        if(a==0&&b==0) cout<<"0"<<endl;
        else if(a==1&&b==1) cout<<"1"<<endl;
        else if(a%2==0)
        {
            if(b==a) cout<<2*a<<endl;
            else if(b==a-2) cout<<2*a-2<<endl;
            else cout<<"No Number"<<endl;
        }
        else
        {
            if(b==a) cout<<2*a-1<<endl;
            else if(b==a-2) cout<<2*a-3<<endl;
            else cout<<"No Number"<<endl;
        }
    }
}