public static void printRec2(int n){
    	if (n==0){
    		return;
    	}
    	int cast = 0;
    	char castChar = 0;
    	for(char j=1; j <= n; j++)
    		cast = j+96;
    		castChar = (char) cast;
    		System.out.print(castChar);
    	System.out.println();
    	printRec(n-1);
    }