#include <bits/stdc++.h>
using namespace std;
int q;
long long pot[100];
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cin >> q;
  pot[0] = 1;
  for (int i = 1; i <= (60); i++) pot[i] = pot[i - 1] * 2LL;
  for (int I = 0; I < (q); ++I) {
    long long a, b, m;
    cin >> a >> b >> m;
    if (b == a)
      cout << 1 << " " << a << "\n";
    else {
      long long mozna = -1;
      for (long long i = 0; i <= 60; i++) {
        long long par = pot[i];
        if ((a + 1LL) * par > b) break;
        if ((a + 1LL) * par <= b && b <= (a + m) * par) {
          mozna = i;
          break;
        }
      }
      if (mozna == -1)
        cout << -1 << "\n";
      else {
        cout << mozna + 2 << " ";
        long long rem = b - a * pot[mozna];
        vector<long long> param;
        for (int i = mozna; i >= (0); i--) {
          long long ost;
          if (i) {
            ost = max(2LL, rem / pot[i - 1] - 1);
            while ((ost + 1) * pot[i - 1] <= rem) ost++;
          } else {
            ost = max(2LL, rem / pot[i] - 1);
            while (ost <= rem) ost++;
          }
          ost--;
          ost = min(ost, m);
          if (i) rem -= ost * pot[i - 1];
          param.push_back(ost);
        }
        long long sum = a;
        cout << sum << " ";
        for (auto x : param) {
          cout << sum + x << " ";
          sum += sum + x;
        }
        cout << "\n";
      }
    }
  }
  return 0;
}
