#include <string_view>

int main()
{
    constexpr std::string_view s = "Cogito, ergo sum!";
    // constexpr bool answer = s.find("Cogito") == 0;
    // constexpr bool answer = s.starts_with("Cogito");
    // constexpr bool answer = s.ends_with("sum!");
    constexpr bool answer = s.contains("ergo");
    return answer;
}