C11112331312111112111133133313331333131333132313211232313232212321   >>    C1111233131211111211113313331333133313133313231321123231323221232   <<    C11112331312111112111133133313331333131333132313211232313232212323   >>      C11112331312111112111133133313331333131333132313211232313232212322   >>