20 possible answers to
Answers with 3 characters: CHI ETA PHI PSI RHO TAU Answers with 4 characters: BETA IOTA ZETA Answers with 5 characters: ALPHA DELTA GAMMA KAPPA OMEGA SIGMA THETA Answers with 6 characters: LAMBDA Answers with 7 characters: OMICRON UPSILON Answers with 13 characters: IONIANEPISTLE