use strict;
use warnings;

my $l = <>; chomp $l;
my $z = () = $l =~ /0/g;
my $f = () = $l =~ /4/g;
my $s = () = $l =~ /6/g;
my $e = () = $l =~ /8/g;
my $n = () = $l =~ /9/g;
my $alpha = $z + $f + $s + 2 * $e + $n;
print 2 * length($l) + 1 + $alpha;