#include <iostream>
#include <string>
#include <cstdlib> 
#include <vector>
#include <map>
    
using namespace std;
    
int main() {
    map<int, vector<string>> length_words;
    
    length_words[1] = {"a", "i"};
    length_words[2] = {"be", "my", "of", "to"};
    length_words[3] = {"for", "ate", "bar", "may", "sit", "coo"};
    length_words[4] = {"four", "date", "bard", "leaf", "seat", "cool"};
         
    int n = 0;
    while (true) {
        cout << "What length of word do you want? ";
        cin >> n;
        if (n == -1) break;

        cout << "Here's a word: ";
        cout << length_words[n][rand() % length_words[n].size()];
        cout << endl;
    }
        
    return 0;
}