Letters that make closed primary
s, a, o, d, e, l, p, c, m, r, i, y are letters that make 'closed primary'
Words within closed primary
mar, os, OS, rima, MA, PR, Prima, ma, Mary, ar, cl, SE, RI, mA, ED, close, primary, closed, prim, rim, AR, Ar, Cl, Os, Pr, Se, Mar, lose are words within 'closed primary'