C11112331312111112111133132313331333133313233313331333132322221221   >>    C1111233131211111211113313231333133313331323331333133313232222122   <<    C11112331312111112111133132313331333133313233313331333132322221223   >>      C11112331312111112111133132313331333133313233313331333132322221222   >>