C11112331312111112111133133313331333131333132312111111331323222233211   >>    C1111233131211111211113313331333133313133313231211111133132322223321   <<    C11112331312111112111133133313331333131333132312111111331323222233213   >>      C11112331312111112111133133313331333131333132312111111331323222233212   >>