string enumToString1(Enum e)
{
    static const map<Enum, string> shit = {
        {A, "A"s},
        {B, "B"s},
        {C, "C"s},
        {D, "D"s},
        {E, "E"s},
    };
    return shit.at(e);
}

string enumToString2(Enum e)
{
    switch (e) {
    case A: return "A"s;
    case B: return "B"s;
    case C: return "C"s;
    case D: return "D"s;
    case E: return "E"s;
    default: return "fuck you";
    }
}

string enumToString3(Enum e)
{
    string ret;
    switch (e) {
    case A: ret = "A"s; break;
    case B: ret = "B"s; break;
    case C: ret = "C"s; break;
    case D: ret = "D"s; break;
    case E: ret = "E"s; break;
    default: ret = "fuck you"; break;
    }
}