And Boy, Is My Tailbone Bent

While riding the eh?-train to file-saving station, I read a computer signpost asserting the computer's divine right as conductor of this swing-fest to "truncate titles exceeding 31 characters in length." That's right.

That slick-haired beat-konducta had set my halfbreed anus up: only 31 boxcars would arrive, though boxcars in excess of 31 had left the station, their plastic little faces all screwed up in serene and brainless repose. Pertinent follow-up query: how many failed to reach the station?

You have thirty seconds. Please show all calculations and fill the back of the page.