main: () = {
    s1 := u"u\"";
    s2 := U"U\"";
    s3 := u8"u8\"";
    s4 := L"L\"";
    s5 := R"(R")";
    s6 := uR"(uR")";
    s7 := u8R"(u8R")";
    s8 := UR"(UR")";
    s9 := LR"(LR")";
    _ = s1;
    _ = s2;
    _ = s3;
    _ = s4;
    _ = s5;
    _ = s6;
    _ = s7;
    _ = s8;
    _ = s9;
}