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:  OBJECTIVE : Tumor necrosis factor - alpha ( TNF - alpha ) induces a variety of cellular responses , some of them being at least seemingly contradictory .

Output: TNF - alpha


Input: Consider Input:  Bcl - 3 protein was also highly expressed in early burst - forming unit - erythroid ( BFU - E ) - derived erythroid precursors ( day 7 ) and decreased during maturation ( days 10 and 14 ) , suggesting that Bcl - 3 is involved in normal erythroid proliferation .

Output: Bcl - 3


Input: Consider Input:  In contrast , 50 % downmodulation of HLA - A2 by Nef required 16 to 24 h and about 50 - to 100 - fold - greater concentrations of 4 - HT .


Output: HLA - A2