zero
one
two
three
four
five
six
seven
eight
nine
ten
eleven
twelve
thirteen
fourteen
fifteen
sixteen
seventeen
eighteen
nineteen
twenty
twenty-one
twenty-two
twenty-three
twenty-four
thirty
thirty-one
forty
fifty
sixty
seventy
eighty
ninety
one hundred
one hundred and one
one hundred and fifty-two
two hundred
one thousand
one million
one billion
one trillion
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