import strscans

let (_, fst, snd) = stdin.readAll.scanTuple"$w $w"

var cnt = 0
if fst in ["Sun","Sat"]:
  inc cnt
  if snd in ["Sun","Sat"]:
    inc cnt

echo case cnt:
  of 0: "8/31"
  of 1: "8/32"
  else: "8/33"