S1A1C3K5F4U1L1
16 points
SACKFUL is validvalid
as much as a sack can hold [n SACKFULS, SACKSFUL]
as much as a sack can hold [n SACKFULS or SACKSFUL]
as much as a sack can hold [n SACKFULS, SACKSFUL]
as much as a sack can hold [n SACKFULS or SACKSFUL]