C11112331312111112111133132313331333133313232212111111331323121   >>    C1111233131211111211113313231333133313331323221211111133132312   <<    C11112331312111112111133132313331333133313232212111111331323123   >>      C11112331312111112111133132313331333133313232212111111331323122   >>