const ballots: Ballot[] = [
  { weight: 2, ranking: [[3], [2, 4], [1], [5]] },
  { weight: 3, ranking: [[5], [4], [2], [1], [3]] },
  { weight: 5, ranking: [[4], [5], [3], [2], [1]] },
  { weight: 7, ranking: [[4], [2, 5], [3], [1]] },