a(b() + 1 + "c" + "d");
a(b() + (2 + "c") + "d");
a((b() + 3) + "c" + "d");
a(b() + 4 + "c" + "d" + ("e" + "f"));
a("e" + "f" + b() + 5 + "c" + "d" + ("e" + "f"));
a("c" + b() + 6 + "d");
a(b() + 'e' + (7 + g('10')));