C11112331312111112111133133313331333132313233313221333132313222321   >>    C1111233131211111211113313331333133313231323331322133313231322232   <<    C11112331312111112111133133313331333132313233313221333132313222323   >>      C11112331312111112111133133313331333132313233313221333132313222322   >>