S = input()
print(min(len(S)*2+1+S.count('0')+S.count('4')+S.count('6')+S.count('8')*2+S.count('9'),len(S)+2+S.count('0')*2+S.count('4')*2+S.count('6')*2+S.count('8')*4+S.count('9')*2))