C11112331312111112111133132313331333133313233313331333133322232321333132323221   >>    C1111233131211111211113313231333133313331323331333133313332223232133313232322   <<    C11112331312111112111133132313331333133313233313331333133322232321333132323223   >>      C11112331312111112111133132313331333133313233313331333133322232321333132323222   >>