DonDiego is the buyer/possessor of 91 tickets; cash in his wallet was running out, so poor old DonDiego had to stop at 91, which is coincidently the product of 7 X 13 !
If teechur finds out, she is likely to opine that she is a half-owner as well.
If teechur finds out, she is likely to opine that she is a half-owner as well.