They

bo class 2

(third-person plural pronoun)

bwo class 14

(third-person plural pronoun)

byo class 8

(third-person plural pronoun)

go class 6

(third-person plural pronoun)

two class 13

(third-person plural pronoun)

yo class 4

(third-person plural pronoun)

zo class 10

(third-person plural pronoun)