C1111233131211111211113313231333133313331323331333133313233313232213233311   >>    C111123313121111121111331323133313331333132333133313331323331323221323331   <<    C1111233131211111211113313231333133313331323331333133313233313232213233313   >>      C1111233131211111211113313231333133313331323331333133313233313232213233312   >>