C2221232323213331311331333133313231323133313221213231133211223121   >>    C222123232321333131133133313331323132313331322121323113321122312   <<    C2221232323213331311331333133313231323133313221213231133211223123   >>      C2221232323213331311331333133313231323133313221213231133211223122   >>