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')))