C11112331312111112111133132313331333133313232212111133133112133113121   >>    C1111233131211111211113313231333133313331323221211113313311213311312   <<    C11112331312111112111133132313331333133313232212111133133112133113123   >>      C11112331312111112111133132313331333133313232212111133133112133113122   >>