def count (n):
    k=0
    def check (i):
        global k
        global sum
        if k == len(n):
            return sum
        if n[i].isdigit() == True:
            k += 1
            sum += 1
        else:
            k += 1
        return check(i+1)
    return (sum)
print(count('asdasd123123123asad123321'))