In Polish in Plural we have two genders:
Male People Gender (oni) -i/-y starzy, młodzi
Not Male People Gender (one) (the rest: women, children, anmals and things, I know it is kind of masculism (-:) -e młode, stare
If we have a mixed group let'say 1 man and 100 women
always Male people gender is stronger
Male People Gender
M -i/-y
D -ych/-ich
C -ym/-im
B=D
N -ymi/-imi
Ms=D
W=M
Not Male People Gender
M -e
D -ych/-ich
C -ym/-im
B=M
N-ymi/-imi
Ms=D
W=M
All other (women, things): -e (the same as in singular)
But only in Singular Neutral! Female and Male gender are different.
Notice We have 3 genders in Sngular (male female neutral) and only 2 in Plural (have a look above)