#include <iostream>
#include <string>

using namespace std;

string StripString(string inputString);

int main() {
     string word = "He3lo Worl542D!";

     cout << "The word is " << word << endl;
     cout << "Stripped it is " << StripString(word) << endl;
     cout << "The word is " << word << endl;
     //cout << "Stripping 123Abc: " << StripString("123ABC") << endl;

     return 0;
}

string StripString(string inputString){
    string modified;
    int i;

    for(i = 0; i < inputString.size(); i++) {
       if (isalpha(inputString[i])) {
           modified += tolower(inputString[i]);
       }
    }

    inputString = "I changed it";


    return modified;
}