array(4) {
  [3]=>
  array(1) {
    [0]=>
    int(66)
  }
  [6]=>
  array(1) {
    [0]=>
    int(90)
  }
  [8]=>
  array(1) {
    [0]=>
    int(138)
  }
  [21]=>
  array(2) {
    [0]=>
    int(9621)
    [1]=>
    int(9631)
  }
}