n = input()
counts = [0] * 10
for k in n:
    counts[int(k)] += 1
loop0 = counts[1] + counts[2] + counts[3] + counts[5] + counts[7]
loop1 = counts[0] + counts[4] + counts[6] + counts[9]
loop2 = counts[8]
if loop1 == loop2 == 0:
    print(loop0 + 2)
else:
    print(loop0 * 2 + loop1 * 3 + loop2 * 4 + 1)