In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.

Input: Consider Input:  Recently we have performed a detailed analysis of specific neuronal populations affected by the mutation which shed new light on the role of Krox - 20 in the segmentation and on the physiological consequences of its inactivation .

Output: Krox - 20


Input: Consider Input:  We cloned the BamHI - F fragment from the left end of Ad4 in pUC13 - 1 between the SalI and BamHI sites in order to carry out the structural analysis of the E1A region of Ad4 .

Output: BamHI sites


Input: Consider Input:  A child presumed to have the 21 - hydroxylase deficiency form of congenital adrenal hyperplasia was studied extensively as an infant .


Output: 21 - hydroxylase