Difficulty reading the letter F

The letter F is not being recognized in about half the words it is found in. For example the word "scientific" is read as "scientiic" and "classification" as "classication". It does prounounce the letter F in many words but this error is common enough to make comprehension difficult. It also splits words that spell check does not recognize into two word sounds. I have shut off spell check and autocorrect and this helps. Please ix the letter F it is very usterating!

Great product overall.

duhbaya about Speak it! Text to Speech, v2.5