#include <iostream.h>
int n;
long int x,y;
void main()
{
	cin>>n;
	for(int i=0;i<n;i++)
	{
		cin>>x>>y;
		if(x!=y&&(x-2)!=y)
			cout<<"No Number"<<endl;
		else
			if(x%2==0)
				cout<<x+y<<endl;
			else
				if(x%2==1)
					cout<<x+y-1;
	}
}
				

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