C2221232323213331311331333133313231333132313331333233113222311211232321   >>    C222123232321333131133133313331323133313231333133323311322231121123232   <<    C2221232323213331311331333133313231333132313331333233113222311211232323   >>      C2221232323213331311331333133313231333132313331333233113222311211232322   >>