C11112331312111112111133133313331333132313233313231323323132233132221   >>    C1111233131211111211113313331333133313231323331323132332313223313222   <<    C11112331312111112111133133313331333132313233313231323323132233132223   >>      C11112331312111112111133133313331333132313233313231323323132233132222   >>