Name three things that should be separated by commas in a series

mabailey

kbuch

avandenbusch

s.mcnelis

ilopetegi

Maggie.Willis

Ragle

Dave.grzesko

e.wincel

jvoeller

aj.mcfetrich

alycia.rogus

npiercekaebisch

summer.bishop

nsteiner

oke.burcu

epruss

aamassa

davecowellaus