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

#define REP(i,n) for(int (i)=0;(i)<(int)(n);(i)++)
#define RREP(i,n) for(int (i)=(int)(n)-1;i>=0;i--)
#define REMOVE(Itr,n) (Itr).erase(remove((Itr).begin(),(Itr).end(),n),(Itr).end())
#define MOD  1000000007
#define INF  0x3f3f3f3f
#define INFL 0x3f3f3f3f3f3f3f3fLL
typedef long long ll;

int main() {
    
    string s; cin >> s;
    int cnt[3] = {};
    REP(i,s.size()) {
        char t = s[i] - '0';
        if(t==1||t==2||t==3||t==5||t==7) cnt[0]++;
        if(t==0||t==4||t==6||t==9) cnt[1]++;
        if(t==8) cnt[2]++;
    }
    
    if(cnt[0] > 0 && cnt[1] == 0 && cnt[2] == 0) {
        cout << cnt[0] + 2 << endl;
        return 0;
    }
    
    if(cnt[0] == 0 && (cnt[1] > 0 || cnt[2] > 0)) {
        cout << cnt[1] * 3 + cnt[2] * 4 + 1 << endl;
        return 0;
    }
    
    cout << cnt[0] * 2 + cnt[1] * 3 + cnt[2] * 4 + 1 << endl;
    
    return 0;
}