//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            string a, b, c;
            Console.Write("Line 1: ");
            a = Console.ReadLine();
            Console.Write("Line 2: ");
            b = Console.ReadLine();
            Console.Write("Line 3: ");
            c = Console.ReadLine();

            if (char.IsLetter(a[a.Length - 1]) && char.IsLetter(b[b.Length - 1]) && char.IsLetter(c[c.Length - 1]))
            {
                Console.WriteLine("Every line ends with letter");
            }
            else
            {
                Console.WriteLine("Not every line ends with letter");
            }
        }
    }
}