P3L1A1I1N1S1O1N1G2S1
13 points
PLAINSONGS is validvalid
PLAINSONG,
PLAINSONG, unmeasured, unaccompanied music sung in unison in ecclesiastical modes from early times
PLAINSONG,
PLAINSONG, unmeasured, unaccompanied music sung in unison in ecclesiastical modes from early times