#include <iostream>

using namespace std;

int encryptioncheck(string koodi){
    string::size_type pituus = 0;
    pituus = koodi.length();
    if (pituus != 26){
        cout << "Error! The encryption key must contain 26 characters." << endl;
        return EXIT_FAILURE;
    }



    std::locale loc;
      std::string str=koodi;

      for (std::string::iterator it=str.begin(); it!=str.end(); ++it)
      {
        if (std::isalpha(*it,loc) and std::islower(*it,loc))
            continue;
        else
          std::cout << "Error! The encryption key must contain only lower case characters." << endl;
          return EXIT_FAILURE;
      }
      for (char a = 'a'; a < 'z'; a++) {
              if (koodi.find(a) == std::string::npos) {
                  std::cout << "Error! The encryption key must contain all alphabets a-z." << std::endl;
                  return EXIT_FAILURE;
              }
          }



    return 0;
}

char encrypt(string encryption, char c) {
    string alphabet = "abcdefghijklmnopqrstuvwxyz";
    string::size_type encrypted = alphabet.find(c);
    return encryption[encrypted];
}






int main()
{
    string encryption_key = " ";
    string encrypted = "";
    cout << "Enter the encryption key: ";
    cin >> encryption_key;
    if (encryptioncheck(encryption_key) == EXIT_FAILURE){
        return EXIT_FAILURE;
    }
    else {
    string text = " ";
    cout << "Enter the text to be encrypted: ";
    cin >> text;
    for (char& c : text) {
        encrypted += encrypt(encryption_key, c);
    }
    cout << "Encrypted text: " << encrypted << endl;
}