question: In triangle X Y Z, Z W and W Y are equal. X W is perpendicular to Z Y. X Y and X Z are 18 + 2y and 5y - 6, respectively. Find X Z.
  Choices:
  A:5
  B:17
  C:18
  D:34
query_wo: Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
  Question: In triangle X Y Z, Z W and W Y are equal. X W is perpendicular to Z Y. X Y and X Z are 18 + 2y and 5y - 6, respectively. Find X Z.
  Choices:
  A:5
  B:17
  C:18
  D:34
query_cot: Please first conduct reasoning, and then answer the question and provide the correct option letter, e.g., A, B, C, D, at the end.
  Question: In triangle X Y Z, Z W and W Y are equal. X W is perpendicular to Z Y. X Y and X Z are 18 + 2y and 5y - 6, respectively. Find X Z.
  Choices:
  A:5
  B:17
  C:18
  D:34
question_for_eval: In triangle X Y Z, Z W and W Y are equal. X W is perpendicular to Z Y. X Y and X Z are 18 + 2y and 5y - 6, respectively. Find X Z.
  Choices:
  A:5
  B:17
  C:18
  D:34