F4L1A1S1H4B3O1A1R1D2S1
20 points
FLASHBOARDS is validvalid
FLASHBOARD, [n]
FLASHBOARD, one of a set of boards set up at the sides of a water channel to deepen it [n]
FLASHBOARD, [n]
FLASHBOARD, one of a set of boards set up at the sides of a water channel to deepen it [n]