How to remove a word from string

Yo , I've got problem with string.I wrote small script who plays sound and show it on GUIText , but it shows me for example: "C (UnityEngine.AudioClip),G (UnityEngine.AudioClip)".I tried to remove this and I failed.

 #pragma strict
 
 var losowa : int ;
 var tekst : GUIText;
 var C : AudioClip;
 var D : AudioClip;
 var E : AudioClip;
 var F : AudioClip;
 var G : AudioClip;
 var A : AudioClip;
 var H : AudioClip;
 
 function Start() 
 {
     var wynik = new Array();
     var tablica = new Array(C,D,E,F,G,A,H);
     var licznik : int=0;
     while(licznik<2)
     {
         losowa = Random.Range(0,7);
         audio.clip = tablica[losowa];
         wynik.Add(tablica[losowa]);
         audio.Play();
         yield WaitForSeconds (2);
         licznik++;
     }
     var str: String;
 
     for (var i = 0; i < wynik.length; i++)
     {
         str = str + wynik[i].ToString();
     }
     print(wynik);
     tekst.text=str;
 }