public static boolean nr1 (String a){
        boolean vlag = true;
        int z = 0;
        for (int i = 0; i<a.length(); i++){
            z = (int)(a.charAt(i));

            if (z<10){
                vlag = true;
                System.out.println(i);
            }
            else{
                vlag = false;
                i=a.length();
                System.out.println(i);
            }

        }
        return vlag;
    }