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

#define VINIT( v, type, n )vector<type> v; v.resize( n );
#define VINIT2( v, type, n, a )vector<type> v; v.resize( n, a );
#define VCIN( v, type, n ) VINIT( v, type, n ) REP( i, n ) cin >> v[i];
#define ALL( x ) x.begin(), x.end()

#define DOUT( x ) cerr << #x << " = " << x << "\n";
#define COUT( x ) cout << ( x ) << "\n";



#define INF 999999999

std::vector<std::string> SearchWord( const std::string& text, const std::string& keyword )
{
        vector<string> res;
        std::regex re( keyword );
        std::sregex_iterator it( text.cbegin(), text.cend(), re );
        std::sregex_iterator end;
        while( it != end)
        {
                res.push_back( it->str() );
                ++it;
        }
        return std::move( res );
}




signed main()
{
        ios::sync_with_stdio( false );
        cin.tie( 0 );

        string n; cin >> n;

        auto v = SearchWord( n, "mi" );
        COUT( v.size() );
        return 0;
}