 Complete the following phrase:  The Comb Ceramic culture or Pit-Comb Ware culture, often abbreviated as CCC or PCW, was a northeast European culture characterised by its PitComb Ware. It existed from around 4200 BCE to around 2000 BCE. The bearers of the Comb Ceramic culture are thought to have still mostly followed the Mesolithic hunter-gatherer lifestyle, with traces of 