#include <iostream>
#include <cctype>
#include <string>

//удаление слова
void str_remove(std::string& s, const std::string& w, bool all = true){
	std::string::size_type p = 0;
	while((p = s.find(w, p)) != std::string::npos){
		if((p == 0 || !isalpha(s[p - 1])) && 
		   (p + w.length() >= s.length()  || !isalpha(s[p + w.length()]))){
			s.erase(p, w.length());
			if(! all)
				break;
		} else
			p += w.length();
	}
}

int main(void){
	std::string s = "APL, AAPL, (APL) APLL, OAPLO APL";
	std::string w = "APL";

	std::cout << s << std::endl;
	str_remove(s, w);
	std::cout << s << std::endl;

	//вставка
	s.insert(5, "* * * GAME * * *");
	std::cout << s << std::endl;
	return 0;
}

APL, AAPL, (APL) APLL, OAPLO APL
, AAPL, () APLL, OAPLO 
, AAP* * * GAME * * *L, () APLL, OAPLO