C11112331312111112111133132313331333133313232212111133133112111133132322212131   >>    C1111233131211111211113313231333133313331323221211113313311211113313232221213   <<    C11112331312111112111133132313331333133313232212111133133112111133132322212133   >>      C11112331312111112111133132313331333133313232212111133133112111133132322212132   >>