C11112331312111112111133133313331333132322121111331233132313221   >>    C1111233131211111211113313331333133313232212111133123313231322   <<    C11112331312111112111133133313331333132322121111331233132313223   >>      C11112331312111112111133133313331333132322121111331233132313222   >>