Think about the following improvements. Reference any additional functions not previously mentioned. ### Search - [ ] [find](https://en.cppreference.com/w/cpp/string/basic_string/find) - [ ] [rfind](https://en.cppreference.com/w/cpp/string/basic_string/rfind) - [ ] [find_first_of](https://en.cppreference.com/w/cpp/string/basic_string/find_first_of) - [ ] [find_first_not_of](https://en.cppreference.com/w/cpp/string/basic_string/find_first_not_of) - [ ] [find_last_of](https://en.cppreference.com/w/cpp/string/basic_string/find_last_of) - [ ] [find_last_not_of](https://en.cppreference.com/w/cpp/string/basic_string/find_last_not_of) ### Non-member functions - [ ] [erase2](https://en.cppreference.com/w/cpp/string/basic_string/erase2) ### Numeric conversions - [ ] [stol](https://en.cppreference.com/w/cpp/string/basic_string/stol) - [ ] [stoul](https://en.cppreference.com/w/cpp/string/basic_string/stoul) - [ ] [stof](https://en.cppreference.com/w/cpp/string/basic_string/stof) ### Helper classes - [ ] [hash](https://en.cppreference.com/w/cpp/string/basic_string/hash)