Monkey 0:
  Starting items: 79, 98
  Operation: new = old * 19
  Test: divisible by 23
    If true: throw to monkey 2
    If false: throw to monkey 3

Monkey 1:
  Starting items: 54, 65, 75, 74
  Operation: new = old + 6
  Test: divisible by 19
    If true: throw to monkey 2
    If false: throw to monkey 0

Monkey 2:
  Starting items: 79, 60, 97
  Operation: new = old * old
  Test: divisible by 13
    If true: throw to monkey 1
    If false: throw to monkey 3

Monkey 3:
  Starting items: 74
  Operation: new = old + 3
  Test: divisible by 17
    If true: throw to monkey 0
    If false: throw to monkey 1

const sampleMonkeys = [
  [
    [79, 98],
    ['*', 19],
    [23, 2, 3],
    0
  ],
  [
    [54, 65, 75, 74],
    ['+', 6],
    [19, 2, 0],
    0
  ],
  [
    [79, 60, 97],
    ['*', 'self'],
    [13, 1, 3],
    0
  ],
  [
    [74],
    ['+', 3],
    [17, 0, 1],
    0
  ],
]