C11112331312111112111133132313331333133313232212111113331333132232223221   >>    C1111233131211111211113313231333133313331323221211111333133313223222322   <<    C11112331312111112111133132313331333133313232212111113331333132232223223   >>      C11112331312111112111133132313331333133313232212111113331333132232223222   >>