C11112331312111112111133133313331333133313132211312111133132322123313232212131   >>    C1111233131211111211113313331333133313331313221131211113313232212331323221213   <<    C11112331312111112111133133313331333133313132211312111133132322123313232212133   >>      C11112331312111112111133133313331333133313132211312111133132322123313232212132   >>