spellout(3)
prints "Three" 

spellout(3,1)
prints "Third" 

spellout(3,1,0)
prints "third" 

spellout(2003)
prints "Two Thousand and Three" 

spellout(2003,1)
prints "Two Thousand and Third" 

spellout(999999999999999)
prints "Nine Hundred Ninety-nine Trillion Nine Hundred Ninety-nine Billion Nine Hundred Ninety-nine Million Nine Hundred Ninety-nine Thousand Nine Hundred and Ninety-nine" 

spellout(999999999999999,0,1,1)
prints "Nine Hundred Ninety-nine Billion Nine Hundred Ninety-nine Milliard Nine Hundred Ninety-nine Million Nine Hundred Ninety-nine Thousand Nine Hundred and Ninety-nine" 

spellout(990)
prints "Nine Hundred and Ninety" 

spellout(990,1)
prints "Nine Hundred and Ninetieth" 

spellout(990,1,0)
prints "nine hundred and ninetieth"