June 2015 Fiendish Function

The Fiendish Function posed during June 2015 had the following sample guesses and replies:

• GUESS
• REPLY
• 1
• 1
• 2
• 1
• 3
• 1
• 4
• 1
• 5
• 1
• 10
• 1

The rule was: "Count the number of syllables in the word for the number".

Suppose the guess was 23:

• Count the number of syllables in "twenty-three", giving 3.

So the result is 3.