array(3) {
  [1]=>
  array(2) {
    [0]=>
    int(5196)
    [1]=>
    int(5434)
  }
  [18]=>
  array(1) {
    [0]=>
    int(6968)
  }
  [21]=>
  array(1) {
    [0]=>
    int(9602)
  }
}