C2221232323213331311331333133313231333132313221323131213112223221   >>    C222123232321333131133133313331323133313231322132313121311222322   <<    C2221232323213331311331333133313231333132313221323131213112223223   >>      C2221232323213331311331333133313231333132313221323131213112223222   >>