C11112331312111112111133133313331312111112111113331333132313331333132313232211   >>    C1111233131211111211113313331333131211111211111333133313231333133313231323221   <<    C11112331312111112111133133313331312111112111113331333132313331333132313232213   >>      C11112331312111112111133133313331312111112111113331333132313331333132313232212   >>