Rock Input
Listen to Line
Until Line is gone
  Cast Line
  Rock Input with Line
  Listen to Line
(end until)
Test takes Start and Sum and Count
  Let I be Start
  Until I is Input minus 1
    Let Item be Input at I
    If Item is mysterious
      Give back nothing
    (end if)
    If Count is 1
      If Item is Sum
        Give back Item
      (end if)
    (end if)
    If Count is greater than 1 and Item is less than Sum
      Let St be I plus 1
      Let Su be Sum minus Item
      Let Co be Count minus 1
      Let Result be Test taking St, Su, Co
      If Result ain't nothing
        Give back Item times Result
      (end if)
    (end if)
    Build I up
    Continue
  (end until)
  Give back nothing
(end function)

Say Test taking 0, 2020, 2
Say Test taking 0, 2020, 3