#include<iostream>
using namespace std;
int main(){
    int n,a,b;
    scanf("%d",&n);
    while(n--){
        scanf("%d%d",&a,&b);
        if(a==b){
            if(a%2==0){
                printf("%d\n",a*2);
            }
            if(a%2==1){
                printf("%d\n",a*2-1);
            }
        }
        else if(a==b+2){
            if(a%2==0){
                printf("%d\n",(a-1)*2);
            }
            if(a%2==1){
                printf("%d\n",a*2-3);
            }
        }
        else
            printf("No Number\n");
    }
    return 0;
}