#include <iostream>
#include <regex>
#include <string>
 
using namespace std;
 
int main() {
 
    string test  = "##### stuff ## #";
    string test2 = "##### stuff ## #";
    int index;
    while( (index = test.find("#")) != string::npos )
    {
        test.replace(index, 1, "hash");
    }
    while( (index = test2.find("##")) != string::npos )
    {
        test2.replace(index, 2, "hash");
    }
    cout<<test<<endl;
    cout<<test2<<endl;
 
    return 0;
}

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