Transcript
  1. 1. 10314123
  2. 2. y1
  3. 3. (1)1(2)(3)(4)(5)(6)(7)(8)
  4. 4. r
  5. 5. (1)2 (2)(3)
  6. 6. sn
  7. 7. (1)3(2)(3)

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