even permutation

16 LETTERS · STARTS WITH E

even permutation is a valid 16-letter word worth 22 points in Scrabble and 28 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

E1V4E1N1P3E1R1M3U1T1A1T1I1O1N1

1 + 4 + 1 + 1 + 0 + 3 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =22 PTS

DOUBLE WORD → 44TRIPLE WORD → 66

MEANING

What does even permutation mean?