C11112331312111112111133133313231333132313331333132211211311332321   >>    C1111233131211111211113313331323133313231333133313221121131133232   <<    C11112331312111112111133133313231333132313331333132211211311332323   >>      C11112331312111112111133133313231333132313331333132211211311332322   >>