#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
int t, n, m, k, l, r, op, x, y;
void solve() {
    cin >> n;
    for (int i = 1; i <= n; i++) {
        cin >> x >> y;
        if(x==y||x-2==y){
            k = x*2-x%2;
            if(x-2==y)k-=2;
            cout<<k;
        }else{
            cout<<"No Number";
        }
        cout<<"\n";
    }
}
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    solve();
    return 0;
}