C11112331312111112111133132313331333133313232213331312111111332211   >>    C1111233131211111211113313231333133313331323221333131211111133221   <<    C11112331312111112111133132313331333133313232213331312111111332213   >>      C11112331312111112111133132313331333133313232213331312111111332212   >>