C11112331312111112111133132313331333133313133311221123232223221   >>    C1111233131211111211113313231333133313331313331122112323222322   <<    C11112331312111112111133132313331333133313133311221123232223223   >>      C11112331312111112111133132313331333133313133311221123232223222   >>