O1U1T1S1E1R1T1S1
8 points
OUTSERTS is validvalid
OUTSERT, a folded sheet placed around a folded section of printed matter [n]
OUTSERT, a sheet enclosing a folded article [n]
OUTSERT, a folded sheet placed around a folded section of printed matter [n]
OUTSERT, a sheet enclosing a folded article [n]