C11112331312111112111133133313231333132313331333121111113313223232321   >>    C1111233131211111211113313331323133313231333133312111111331322323232   <<    C11112331312111112111133133313231333132313331333121111113313223232323   >>      C11112331312111112111133133313231333132313331333121111113313223232322   >>