Okay, I ran random.org from 1-100 and gave Marie all odds and Susan all evens (I know the odds are the same as if I did 1-2, but it sounds better with a larger range, lol).
Random.org range: 1-100
Marie: 1-99 (odd)
Susan: 2-100 (even)
Result: 20
Susan is the winner!! Congratulations!!n
PM/FB me your address!
Thank you both for participating!!