A

#include <bits/stdc++.h>
using namespace std;

#define ll     long long
#define _test   int _TEST; cin>>_TEST; while(_TEST--)
#define pb     push_back

int main()
{
    _test
    {
        int n, x, y;
        cin>>x>>y>>n;

        vector<int> a(n);

        a[n-1] = y;

        for(int i=n-2, j=1; i>=0; i--)
            a[i] = a[i+1]-(j++);

        if(a[0] < x)
        {
            cout<<-1<<"\n";
            continue;
        }

        a[0] = x;

        for(auto e: a)
            cout<<e<<" ";
        cout<<"\n";
    }
}