In this task, you will be given sentences in which you have to recognize the name of the body cells. A cell is a mass of cytoplasm that is bound externally by a cell membrane. Usually microscopic in size, cells are the smallest structural units of living matter and compose all living things. Although there might be several correct answers, you need to write one of them.

Example Input:  Dextransucrase ( EC 2 . 4 . 1 . 5 ) , which catalyses soluble glucan synthesis , was most active in the supernatant fluid from cultures grown with excess glucose , fructose or sucrose , but full activity was detected only when the enzyme was incubated with both sucrose and dextran .
Example Output: EC

Example Input:  Our panel of specific PTPase primers should be very useful for semiquantitatively assessing the repertoire of PTPases expressed by cells .
Example Output: cells

Example Input:  Here we have investigated the potential involvement of the Src - like adapter protein ( SLAP - 2 ) in signaling by the CSF - 1 receptor in mouse bone marrow - derived macrophages .
Example Output:
macrophages