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

Input: Consider Input: The accumulation of metal (Co, Cr, Cu, Mn and Zn) in freshwater Ulva (Chlorophyta) and its habitat.

Output: Mn


Input: Consider Input: Nocapyrones H-J, 3,6-Disubstituted α-Pyrones from the Marine Actinomycete Nocardiopsis sp. KMF-001.

Output: 3,6-Disubstituted α-Pyrones


Input: Consider Input: Genetic Insights into Pyralomicin Biosynthesis in Nonomuraea spiralis IMC A-0156.


Output: Pyralomicin


