#yuki_509

s=raw_input()
l=len(s)
h1=s.count('0')+s.count('4')+s.count('6')+s.count('9')
h2=s.count('8')*2
res1=1+l*2+h1+h2
res2=l+(h1+h2+1)*2
res=min(res1,res2)
print res