Classify the given a piece of financial news into three classes: positive, negative, and neutral. Output must be 'positive', 'negative', or 'neutral'.

Input: Consider Input: Operating profit rose to EUR 13.5 mn from EUR 9.7 mn in the corresponding period in 2006 .

Output: positive

Input: Consider Input: The contract covers HDO platform , AC800 and CXE880 optical Fttb nodes designed to increase the forward and return path capacity of the transmission networks .

Output: positive

Input: Consider Input: Biohit Oyj develops , manufactures and markets liquid handling products and diagnostic test systems for use in research , healthcare and industrial laboratories .
Output: neutral