using System;
using System.IO;
using System.Security.Cryptography;

namespace nucleardemo
{
    class Program
    {
        static void Main(string[] args)
        {
            Func<string, string> pipeline = s => s
                .pipe(File.OpenRead)
                .pipe(MD5.Create().ComputeHash)
                .pipe(Convert.ToBase64String);

            Func<string> sink = Console.ReadLine;
            Action<string> drain = Console.WriteLine;

            sink.ring(drain, pipeline);
        }
    }

    public static class Ex
    {
        public static R pipe<T, R>(this T input, Func<T, R> transformer)
        {
            return transformer(input);
        }

        public static void pipe<T>(this T input, Action<T> mutator)
        {
            mutator(input);
        }

        public static void ring<T, R>(this Func<T> sink, Action<R> drain, Func<T, R> pipeline)
        {
            sink()
                .pipe(pipeline)
                .pipe(drain);

            sink.ring(drain, pipeline);
        }
    }
}