array(6) {
  [0]=>
  string(2) "fm"
  [1]=>
  string(3) "b11"
  [2]=>
  string(3) "b11"
  [3]=>
  string(2) "b5"
  [4]=>
  string(4) "2019"
  [5]=>
  string(3) "m13"
}