C11112331312111112111133133313231333133313311221333132313231221   >>    C1111233131211111211113313331323133313331331122133313231323122   <<    C11112331312111112111133133313231333133313311221333132313231223   >>      C11112331312111112111133133313231333133313311221333132313231222   >>