Hello, When I want to find something in a stack of papers, the necessary one is often the last or penultimate. It seems to be the case in roughly 70 or 80 % of such and similar situations. At the bus stop for No7, 10, and 15, by the same token, the 7 you need will be the last to come; on the day you need the 10 there will be a lot of sevens and fifteens. Do you say By Murphy’s law there were only sevens and fifteens? Thank you.