#include <bits/stdc++.h>
using namespace std;
int main()
{
    int t;
    cin >> t;
    while (t--)
    {
        int x,y;
        cin>>x>>y;
        
        for(int i=1;i<=100;i++){
            if(i%x!=0 && i%y!=0){
                cout<<i<<endl;
            }else cout<<"-1"<<endl;
        }
    }
}