O1C3T1O1D2E1C3I1M3O1S1
18 points
OCTODECIMOS is validvalid
OCTODECIMO, a book whose leaves were printed 18 to a sheet [n]
OCTODECIMO, a book with sheets so folded [n]
OCTODECIMO, a book whose leaves were printed 18 to a sheet [n]
OCTODECIMO, a book with sheets so folded [n]