#include <iostream>

using namespace std;

void below20(int x)
{
    switch (x){
        case 1: cout << "ein"; break;
        case 2: cout << "zwei"; break;
        case 3: cout << "drei"; break;
        case 4: cout << "vier"; break;
        case 5: cout << "fünf"; break;
        case 6: cout << "sechs"; break;
        case 7: cout << "sieben"; break;
        case 8: cout << "acht"; break;
        case 9: cout << "neun"; break;
        case 10: cout << "zehn"; break;
        case 11: cout << "elf"; break;
        case 12: cout << "zwölf"; break;
        case 13: cout << "dreizehn"; break;
        case 14: cout << "vierzehn"; break;
        case 15: cout << "fünfzehn"; break;
        case 16: cout << "sechzehn"; break;
        case 17: cout << "siebzehn"; break;
        case 18: cout << "achtzehn"; break;
        case 19: cout << "neunzehn"; break;
    }
}

void twoDigit (int x)
{
    switch (x){
        case 2: cout << "zwanzig"; break;
        case 3: cout << "dreißig"; break;
        case 4: cout << "vierzig"; break;
        case 5: cout << "fünfzig"; break;
        case 6: cout << "sechzig"; break;
        case 7: cout << "siebzig"; break;
        case 8: cout << "achtzig"; break;
        case 9: cout << "neunzig"; break;
    }
}

void numberToWords (int x)
{

    if (x == 0)
        cout << "null";

    if (x % 1000)
    {
        below20(x/100);
        cout << "hundert";
        x = x % 100;
    }

    if (x >= 1 && x <= 19)
    {
        below20(x);
        if (x == 1)
            cout << "s";
    }
    else
        if(x >= 20 && x <= 99)
        {
            if(x % 10 != 0)
            {
                below20(x%10);
                cout << "und";
            }
            twoDigit(x/10);
        }
}

int main() {
    int x;
    cout << "Bitte Zahl eingeben: \n";
    cin >> x;
    numberToWords(x);
    return 0;
}