C11112331312111112111133133313231333132313331333132213331312321   >>    C1111233131211111211113313331323133313231333133313221333131232   <<    C11112331312111112111133133313231333132313331333132213331312323   >>      C11112331312111112111133133313231333132313331333132213331312322   >>