26         std::string phone_book("555-1234, 555-2345, 555-3456");  in main()  local
27         std::string r = std::regex_replace(phone_book, phone_numbers,  in main()
33         std::string phone_book("555-1234, 555-2345, 555-3456");  in main()  local
34         std::string r = std::regex_replace(phone_book, phone_numbers,  in main()
41         std::string phone_book("555-1234, 555-2345, 555-3456");  in main()  local
42         std::string r = std::regex_replace(phone_book, phone_numbers,  in main()
49         std::string phone_book("555-1234, 555-2345, 555-3456");  in main()  local
50         std::string r = std::regex_replace(phone_book, phone_numbers,  in main()
57         std::string phone_book("555-1234, 555-2345, 555-3456");  in main()  local
58         std::string r = std::regex_replace(phone_book, phone_numbers,  in main()
65         std::string phone_book("555-1234, 555-2345, 555-3456");  in main()  local
66         std::string r = std::regex_replace(phone_book, phone_numbers,  in main()