(* test id definitions *)

main(): void {

 {  
    aaa2aa3a: int;  (* correct *)

    2aa3a: int;  (* error - line 9 *)

    aaa3: int;  (* error - line 11 *)

    _aaa: int;  (* error - line 13 *)

    aaa_: int;  (* error - line 15 *)

    aaa_2b: int;  (* correct *)

    aaa__b: int;  (* error - line 19 *)

    Aaa_b: int;  (* correct - not case sensitive *) 

    aaaaaaaaaaaaaaaaaaaa: int;  (* error - too long line 23 *) 

    a2a_a3a: int; (* correct *)

    a_a_a3_a67a: int; (* correct *)

    a_35a: int; (* correct *)

}