C11112331312111112111133133313331333133313123313331323221211111122112323131   >>    C1111233131211111211113313331333133313331312331333132322121111112211232313   <<    C11112331312111112111133133313331333133313123313331323221211111122112323133   >>      C11112331312111112111133133313331333133313123313331323221211111122112323132   >>