#include <stdio.h>
#include <iostream>
#include <bits/stdc++.h>
#include <string>
#include <map>


using namespace std;
int main() {
  string input;
  string input_mod;

  map<char, int> char_count; 
  //maps act sort of like an array, but insted of having numbers for indexes we can make our own indexes, called keys.
  //so we can say things like char_count['asdf'] = 1.
  
  while(true) {
    cout << "\nType in a string.\n";
    getline(cin, input);

    input_mod = input;
    reverse(input_mod.begin(), input_mod.end());
    cout << "\nString in reverse order:\t\t\t\t" << input_mod << "\n";


    cout << "Number of characters in string:\t\t\t\t" << input.length() << "\n"; 

    input_mod.erase(remove_if(input_mod.begin(), input_mod.end(), ::isspace), input_mod.end());
    cout << "Number of characters in the string, excluding spaces:\t" << input_mod.length() << "\n";



    for(char c : input) {                          //for every character in our string
      if(char_count.find(c) == char_count.end()) { //if the key doesnt exist in the char_count map, the following will execute:
        char_count.insert({c, 1});                 //we create a key and give it a value of 1.
      }
      else {
        char_count[c]++;                            //otherwise, if the key exists, we add it by 1.
      }
    }
    
    for(auto const& c : char_count){              //for every key/value in the map,
      cout << (char)c.first << ":\t" << (int)c.second << "\n"; //we print the key (pair.first) and the value (pair.second)
    }

    char_count.clear();



    cout << "Would you like to exit? (y/n)\n";
    getline(cin, input);
    if(input.at(0) == 'y'){
      return 0;
    }

  }
}