C11112331312111112111133132313331333133313232212111111211331323233212131   >>    C1111233131211111211113313231333133313331323221211111121133132323321213   <<    C11112331312111112111133132313331333133313232212111111211331323233212133   >>      C11112331312111112111133132313331333133313232212111111211331323233212132   >>