【導讀】redgreen. blueyellow. black. purple. pink. orange. white. 4. 9. 13. 5. 810. 2. 12. 7. 11. 13. thirteen. 14. fourteen. 15. fifteen. 16. sixteen. 17. seventeen. 18. eighteen. 19. nieen. 20. twenty. threethirteen→。four→fourteen. five. six. seven. eight. nine. fifteen→。→?!?。→?!?。sixteen. seventeen. eighteen. nieen