import sys
n = str(sys.argv[1]) # n = sys.argv[1] також не працює

def count_holes(n):
    n = n.lstrip('0')
    if n[0] == '-' or n[0] == '+':
        n = str(n[1:])

    if type(n) == int or n.isdigit():
        new = str(n)
        count = 0
        for x in new:
            if x == '0':
                count += 1
            if x == '4':
                count += 1
            if x == '6':
                count += 1
            if x == '9':
                count += 1
            if x == '8':
                count += 2
        return count
    else:
        print 'ERROR'

print count_holes(n)