In this task, you will be given sentences in which your task is to recognize the name of the organ of the body. An organ is a collection of tissues that structurally form a functional unit specialized to perform a particular function. Although there might be several correct answers, you need to write one of them.

Input: Consider Input:  In vitro cytotoxic potential and mechanism of action of selected coumarins , using human renal cell lines .

Output: renal


Input: Consider Input:  After one month ' s treatment there was striking radiological improvement apart from the persistence of the oesophageal stricture .

Output: oesophageal


Input: Consider Input:  Clinical comparison of intraocular pressure ( IOP ) measured with the Goldmann applanation tonometer ( GAT ) , the ProTon tonometer ( PT ) , and the Schiotz tonometer ( ST ) , in normal eyes , eyes with scarred corneas and postkeratoplasty eyes .


Output: eyes


