#include<iostream>
#include<cmath>
#include<cstring>
#include<string>
#include<algorithm>
using namespace std;

int main()
{
    int n;
    cin>>n;
    while(n--)
    {
        int x,y;
        cin>>x>>y;
        int sum=x+y;
        if(x==y)
        {
            if(sum%4==0)
                cout<<sum<<endl;
            else
                cout<<sum-1<<endl;
        }
        else if(x==y+2)
        {
            if(sum%4==0)
                cout<<sum-1<<endl;
            else
                cout<<sum<<endl;
        }
        else
            cout<<"No Number"<<endl;
    }

    return 0;
}