In this task, you are given a sentence. You are expected to write the name of the organism substances in the body mentioned in the input. Although there might be several correct answers, you need to write one of them.

Example Input:  No blood flow signal was observed in the masses of 13 cases ( 3 of metastatic adenocarcinoma , 5 of adenoma , 5 of polypus ) .
Example Output: blood

Example Input:  These new recommendations and revelations open the door for local antimicrobial approaches to reduce the challenge of plaque - induced bacteremias .
Example Output: plaque

Example Input:  No . of samples assayed 18 22 22 70
Example Output:
samples