Syllable Count Function

Create a function that counts the number of syllables a word has. Each syllable is separated with a dash -.

Examples
number_syllables("buf-fet") ? 2

number_syllables("beau-ti-ful") ? 3

number_syllables("mon-u-men-tal") ? 4

number_syllables("on-o-mat-o-poe-ia") ? 6

Notes
Don't forget to return the result.
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This is what I came up with so far:

def number_syllables(word):

    return word.split("-") and word.count(word)