#include <bits/stdc++.h>
#define FOR(i,bg,ed) for(ll i=(bg);i<(ed);i++)
#define REP(i,n) FOR(i,0,n)
#define MOD 1000000007
#define int long long
using namespace std;
typedef long long ll;
const int INF = 1e9;



signed main()
{
    map<char, int> ma;
    ma['0'] = ma['4'] = ma['6'] = ma['9'] = 1;
    ma['1'] = ma['2'] = ma['3'] = ma['5'] = ma['7'] = 0;
    ma['8'] = 2;

    string n;
    cin >> n;

    int ana = 0;
    REP(i,n.length()) {
        ana += ma[n[i]];
    }

    cout << min(2 * n.length() + ana + 1, 2 * (ana + 1) + n.length()) << endl;
}