#include <iostream>
#include <string>
#include <fstream>
#include <algorithm>
using namespace std;

class toLower {public: char operator() (char c) const {return tolower(c);}};

int main()
{
  ifstream fin;
  string fileInput;

  //Create a list
  const int MAX_INPUTS = 10;
  int nInput = 0;
  string input[MAX_INPUTS];

  cout << "Enter file to open: ";
  cin >> fileInput;
  cin.ignore(1000, 10);

  fin.open(fileInput.c_str());
  if (!fin.good()) {
    cout << "Unable to open file: " << fileInput << "\n";
    throw "I/O error";
  }

  while (fin.good()) {  
    string aInput;
    fin >> aInput;
    fin.ignore(1000, 10);

    //Check for blank lines
    if (aInput.length() > 0) {

      //Check for duplicates
      bool good = true;
      for (int i = 0; i <= nInput; i++) {
        if (input[i] == aInput) {
          good = false;
          break;
        } //if
      } //for

      //Stop at 10names
      if (good) {
        if (nInput < MAX_INPUTS) {
          input[nInput++] = aInput;
        }
      } //if
    } //if
  } //while

  //Sort alphabetically
  for (int i = 0; i < nInput; i++) {
    for (int j = i + 1; j < nInput; j ++) {
      string temp1 = input[i];
      transform(input[i].begin(), input[i].end(), input[i].begin(), toLower());
      if (input[i] > input[j]) {
        string temp = input[i];
        input[i] = input[j];
        input[j] = temp;
        if (input[j] != temp1) {
          input[j] = temp1;
        }
      }
      else {
        if (input[i] != temp1) {
          input[i] = temp1;
        }
      }
    }
  }

  for (int i = 0; i < nInput; i++) {
    cout << input[i] << "\n";
  }
  return 0;
}