C312312111112111113121333133313331333133313331333211232313233313231323233232211   >>    C31231211111211111312133313331333133313331333133321123231323331323132323323221   <<    C312312111112111113121333133313331333133313331333211232313233313231323233232213   >>      C312312111112111113121333133313331333133313331333211232313233313231323233232212   >>