C11112331312111112111133132313331333133313232212111111211331323233213233231   >>    C1111233131211111211113313231333133313331323221211111121133132323321323323   <<    C11112331312111112111133132313331333133313232212111111211331323233213233233   >>      C11112331312111112111133132313331333133313232212111111211331323233213233232   >>