C11112331312111112111133133313231333132313331333232213331323233232212321   >>    C1111233131211111211113313331323133313231333133323221333132323323221232   <<    C11112331312111112111133133313231333132313331333232213331323233232212323   >>      C11112331312111112111133133313231333132313331333232213331323233232212322   >>