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.

Input: Consider Input:  If the microbial strain was only detected once for a sample , we then checked the second culture results in the suspected infectious sites .

Output: sample


Input: Consider Input:  Among adolescent boys in Chapaevsk , Russia , higher serum levels of sum of dioxin - like compounds and sum of dioxin TEQs were positively associated with increased age , consumption of fish , local meats other than chicken , and inversely with weeks of gestation .

Output: serum


Input: Consider Input:  The injury to the airway can create binding sites for bacteria in the basement membrane of the bronchial tree and the stimulation of the secretion of mucus , which then stagnates and can create potential sites for bacterial adherence .


Output: mucus


