C11112331312111112111133132313331333133313232212111113331333132232213331311211   >>    C1111233131211111211113313231333133313331323221211111333133313223221333131121   <<    C11112331312111112111133132313331333133313232212111113331333132232213331311213   >>      C11112331312111112111133132313331333133313232212111113331333132232213331311212   >>