12.input 144 B

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  1. xx-end
  2. EG-xx
  3. iy-FP
  4. iy-qc
  5. AB-end
  6. yi-KG
  7. KG-xx
  8. start-LS
  9. qe-FP
  10. qc-AB
  11. yi-start
  12. AB-iy
  13. FP-start
  14. iy-LS
  15. yi-LS
  16. xx-AB
  17. end-KG
  18. iy-KG
  19. qc-KG
  20. FP-xx
  21. LS-qc
  22. FP-yi