C11112331312111112111133133313331333132322121111331311331333132313331322231231   >>    C1111233131211111211113313331333133313232212111133131133133313231333132223123   <<    C11112331312111112111133133313331333132322121111331311331333132313331322231233   >>      C11112331312111112111133133313331333132322121111331311331333132313331322231232   >>