Don't understand one sentence about masks

[Snoopy]

yeah this sentence seems to be a little bit misleading

your provided mask will indeed generate passwords like you want

hashcat -a3 --stdout ?l?l?lpart?d?d

qvopart72
mfopart72
czupart72
bxtpart72
aqmpart72
...
rkepart80
kbepart80
hdepart80
gcepart80
fjmpart80
nropart80