#include <bits/stdc++.h>

using namespace std;


typedef int32_t h_int32;
typedef int64_t h_int64;
typedef uint32_t uh_int32;
typedef uint64_t uh_int64;
typedef h_int64 h_int;

#define REP( i, n ) for(h_int i = 0; i < ( h_int )( n ); ++i )
#define REPR( i, n ) for(h_int i = ( h_int )( n ); i >= 0; --i )
#define FOR( i, a, n ) for(h_int i = ( h_int )( a ); i < ( h_int )( n ); ++i )
#define FORR( i, a, n ) for(h_int i = ( h_int )( n ); i >= ( h_int )( a ); --i)

#define ALL( x ) x.begin(), x.end()

#define DOUT( x ) cerr << #x << " = " << x << "\n"
#define COUT( x ) cout << ( x ) << "\n"
#define DOUBLECOUT( num, x ) cout << fixed << setprecision( num ) << ( x ) << "\n"

#define INF 999999999
#define PI 3.14159265359


int f( char c )
{
        switch(c)
        {
        case '0':
        case '4':
        case '6':
        case '9': return 1;
        case '8': return 2;
        default: return 0;
        }
}

signed main()
{
        ios::sync_with_stdio( false );
        cin.tie( 0 );
        string s;
        cin >> s;
        int cnt = 0;
        REP( i, s.size() )
        {
                cnt += f( s[i] );
        }
        COUT( ( ( int )s.size() > cnt + 1 ) ? 2 * ( cnt + 1 ) + s.size() : 2 * s.size() + cnt + 1 );
        // n> a+1
        //
}