C111123313121111121111331333133313331323132333132313331333131133132213223212121   >>    C11112331312111112111133133313331333132313233313231333133313113313221322321212   <<    C111123313121111121111331333133313331323132333132313331333131133132213223212123   >>      C111123313121111121111331333133313331323132333132313331333131133132213223212122   >>