#include <bits/stdc++.h>
using namespace std;
const int N = 200100;
const int M = 200100;
const int inf = 1e9;
const long double pi = 3.141592653589793238462643;
int n;
bool go(vector<long long>& v, long long a, long long b, long long m) {
  long long l = a;
  long long r = a;
  long long i = 0;
  while (r < b) {
    i++;
    l = (1ll << (i - 1)) * (a + 1);
    r = (1ll << (i - 1)) * (m + a);
  }
  if (b < l) return 0;
  vector<long long> ans;
  b -= (1ll << (i - 1)) * a;
  i--;
  while (i > 0) {
    long long f = (1ll << (i - 1));
    long long left = (1ll << (i - 1));
    long long right = (1ll << (i - 1)) * m;
    long long le = 1;
    long long ri = m + 1;
    long long mid = 1;
    while (1) {
      mid = (le + ri) / 2;
      if (b - f * mid < left)
        ri = mid;
      else if (b - f * mid > right)
        le = mid;
      else
        break;
    }
    b -= f * mid;
    ans.push_back(mid);
    i--;
  }
  ans.push_back(b);
  v.push_back(a);
  for (int i = 0; i < ((int)(ans).size()); i++) {
    long long cur = ans[i];
    for (int j = 0; j <= i; j++) cur += v[j];
    v.push_back(cur);
  }
  return 1;
}
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  cin >> n;
  for (int i = 0; i < (n); i++) {
    long long a, b, m;
    cin >> a >> b >> m;
    vector<long long> v;
    if (a == b) {
      cout << 1 << " " << a << "\n";
      continue;
    }
    if (go(v, a, b, m)) {
      cout << ((int)(v).size()) << " ";
      for (int j = 0; j < (((int)(v).size())); j++) {
        cout << v[j] << " ";
      }
      cout << "\n";
    } else {
      cout << -1 << "\n";
    }
  }
  return 0;
}
