namespace Test
{
    using System;
    using System.Collections.Generic;
    using System.Linq;
 
    /// <summary>
    /// 
    /// </summary>
    public class Program
    {
        /// <summary>
        /// 
        /// </summary>
        public static void Main()
        {
            List<string[]> data = new List<string[]> { 
                new[] { "longenough", "short" }, 
                new[] { "short", "longenough" }, 
                new[] { "short", "short" } };
 
            var allRowsHavingSomeWordWithLengthGreaterThanFive = (from d in data
                                                                  where d != null
                                                                  from c in d
                                                                  where c != null && c.Length > 5
                                                                  select d).ToArray();
 
            foreach (var row in allRowsHavingSomeWordWithLengthGreaterThanFive)
            {
                foreach (var str in row)
                {
                    Console.Write(str);
                    Console.Write(" ");
                }
 
                Console.WriteLine();
            }
        }
    }
}
 

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