Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.

Example Input: What keeps the sensitivity of hormones at the same level, oh I mean the immune system?
Example Output: What keeps the sensitivity of the immune system at the same levels? 

Example Input: How many disasters no casualties did British get?
Example Output: How many casualties did British get?

Example Input: Lots of helper cells, sorry I mean tumor cells  have fewer of what type of molecule on their surface?
Example Output:
Lots of tumor cells have fewer of what type of molecule on their surface?