Original sentence: 2100  Twenty-one hundred   Two thousand, one hundred Twenty-one-aught.2101  Twenty-one oh oneTwo thousand, one oh-one Two thousand, one hundred (and) one  Twenty one hundred (and) one
Edited sentence: 2100  Two thousand, one hundred and Twenty-one hundred are used equally.2101  Twenty-one oh one or Two thousand one oh oneTwo thousand, one oh-one  Twenty one hundred (and) one