#include "stdio.h"
void main()
{
	long x,y,n,i;
	scanf("%d",&n);
	for(i=0;i<n;i++)
	{
		scanf("%d%d",&x,&y);
		if(x==y||(x-2)==y)
		{
			if(x%2==0&&y%2==0)printf("%d\n",x+y);
			else printf("%d\n",x+y-1);
		}
		else printf("No Number\n");
	}
}