C1111233131211111211113313331333133313231121133212331333131133132322121   >>    C111123313121111121111331333133313331323112113321233133313113313232212   <<    C1111233131211111211113313331333133313231121133212331333131133132322123   >>      C1111233131211111211113313331333133313231121133212331333131133132322122   >>