2021/day12/input.txt

   1 TR-start
   2 xx-JT
   3 xx-TR
   4 hc-dd
   5 ab-JT
   6 hc-end
   7 dd-JT
   8 ab-dd
   9 TR-ab
  10 vh-xx
  11 hc-JT
  12 TR-vh
  13 xx-start
  14 hc-ME
  15 vh-dd
  16 JT-bm
  17 end-ab
  18 dd-xx
  19 end-TR
  20 hc-TR
  21 start-vh