Early on at Saturday’s North Suburban Conference girls swimming and diving championships at Stevenson, Ayrton “Art” Kasemets’ heat sheets resembled a thin, crumpled, rolled-up newspaper. His Patriots left him exhausted, in a good way, Saturday in Lincolnshire. Stevenson won 7 of the 12 events — including 3 consecutive races in which they collected gold, silver and bronze — and skipped to the program’s sixth consecutive NSC title with a 324-point total.