MolokoKorova1Burenka

MolokoKorova2marusya

MolokoKorovaZorka

Moloko Korova 1 Burenka

Moloko Korova 2 marusya

Moloko Korova Zorka

import re
pattern = re.compile(r'([A-Z][a-z]+|(?<=\d)[a-z]+|\d)')

' '.join( pattern.findall('MolokoKorova1burenka') )

>>>'Moloko Korova 1 burenka'

' '.join( pattern.findall('MolokoKorovaZorka') )

>>>Moloko Korova Zorka