data/advent21a.txt

   1 root: pppw + sjmn
   2 dbpl: 5
   3 cczh: sllz + lgvd
   4 zczc: 2
   5 ptdq: humn - dvpt
   6 dvpt: 3
   7 lfqf: 4
   8 humn: 5
   9 ljgn: 2
  10 sjmn: drzm * dbpl
  11 sllz: 4
  12 pppw: cczh / lfqf
  13 lgvd: ljgn * ptdq
  14 drzm: hmdt - zczc
  15 hmdt: 32