C1111233131211111211113313331333132313231323223313331311331333211232311   >>    C111123313121111121111331333133313231323132322331333131133133321123231   <<    C1111233131211111211113313331333132313231323223313331311331333211232313   >>      C1111233131211111211113313331333132313231323223313331311331333211232312   >>