Annonymos Vox

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _23._02._2020
{
    class Program
    {

        static bool isLetter(char a)
        {
            return (a >= 'A' && a <= 'Z') || (a >= 'a' && a <= 'z');
        }

        static Dictionary<int, string> getStrings(string text)
        {
            string temp = "";
            int startPosition = -1;
            Dictionary<int, string> strings = new Dictionary<int, string>();
            for (int i = 0; i < text.Length; i++)
            {
                if (isLetter(text[i]))
                {
                    temp += text[i];
                    if (startPosition < 0) startPosition = i;
                }
                else
                {
                    if (temp != "") strings.Add(startPosition, temp);
                    temp = "";
                    startPosition = -1;
                }
            }
            if (temp != "") strings.Add(startPosition, temp);

            return strings;
        }

        static void Main(string[] args)
        {
            string text = Console.ReadLine();
            string temp = "";
            Dictionary<int, string> strings = new Dictionary<int, string>();
            Dictionary<int, string> sortedStrings = new Dictionary<int, string>();
            Dictionary<int, string> seqStr = new Dictionary<int, string>();
            Dictionary<int, int> startEnds = new Dictionary<int, int>();

            strings = getStrings(text);

            foreach (var pair in strings.OrderBy(key => key.Value))
            {
                sortedStrings.Add(pair.Key, pair.Value);
                //Console.WriteLine(pair.Key + " " + pair.Value);
            }


            for (int i = 0; i < sortedStrings.Count - 1; i++)
            {
                KeyValuePair<int, string> pair = new KeyValuePair<int, string>(sortedStrings.Keys.ElementAt(i), sortedStrings.Values.ElementAt(i));
                var nextPair = new KeyValuePair<int, string>(sortedStrings.Keys.ElementAt(i + 1), sortedStrings.Values.ElementAt(i + 1));

                if (pair.Value == nextPair.Value)
                {
                    if (!seqStr.ContainsKey(pair.Key)) seqStr.Add(pair.Key, pair.Value);
                    if (!seqStr.ContainsKey(nextPair.Key)) seqStr.Add(nextPair.Key, nextPair.Value);
                }
            }
            int lastindex = -1;
            for (int i = 0; i < seqStr.Count - 1; i++)
            {
                KeyValuePair<int, string> pair = new KeyValuePair<int, string>(seqStr.Keys.ElementAt(i), seqStr.Values.ElementAt(i));
                KeyValuePair<int, string> nextPair = new KeyValuePair<int, string>(seqStr.Keys.ElementAt(i + 1), seqStr.Values.ElementAt(i + 1));
                if (lastindex < 0) lastindex = pair.Key;
                if (pair.Value != nextPair.Value)
                {
                    Console.WriteLine(pair.Value + " - " + nextPair.Value);
                    startEnds.Add(lastindex, pair.Key);
                    lastindex = -1;
                }
                if (i == seqStr.Count - 2)
                {
                    startEnds.Add(lastindex, nextPair.Key);
                }
            }


            foreach (var pair in seqStr)
            {
                Console.WriteLine(pair.Key + " " + pair.Value);
            }

            foreach (var pair in startEnds)
            {
                Console.WriteLine(pair.Key + " " + pair.Value);
            }
        }
    }
}