#include <bits/stdc++.h>
using namespace std;

using ll=long long;
#define int ll

#define FOR(i,a,b) for(int i=int(a);i<int(b);i++)
#define REP(i,b) FOR(i,0,b)

int read(){
	int i;
	scanf("%lld",&i);
	return i;
}

signed main(){
	// your code goes here
	int n = read();
	int hole = 0;
	string N = to_string(n);
	REP(i,N.length()){
		if(N[i] == '0' || N[i] == '4' || N[i] == '6' || N[i] == '9') hole += 1;
		else if(N[i] == '8') hole += 2;
	}
	cout << N.length()+2*hole+2;
	//if(hole==0) cout << N.length()+2;
	//else cout << 2*N.length()+1+hole;
}