8,jessie 9,stretch 10,buster 11,bullseye 12,bookworm 16.04 LTS,xenial 16.10,yakkety 17.04,zesty 17.10,artful 18.04 LTS,bionic 18.10,cosmic 19.04,disco 19.10,eoan 20.04 LTS,focal 20.10,groovy 21.04,hirsute 21.10,impish