In this task, you will be given sentences in which your task is to recognize the name of the drug or medicine. Drugs are substances that change a person's mental or physical state. They can affect how your brain works, how you feel and behave, your understanding, and your senses. Although there might be several correct answers, you need to write one of them.

Input: Consider Input: Paraplegia following intrathecal cytosine arabinoside.

Output: cytosine arabinoside


Input: Consider Input: Reversible sclerotic changes of lumbar spine and femur due to long-term oral isotretinoin therapy.

Output: isotretinoin


Input: Consider Input: We describe a case of ulcerative proctitis after ibuprofen treatment in a girl with juvenile systemic lupus erythematosus.


Output: ibuprofen