#include <iostream>
#include <string>

using namespace std;

enum miin {M, I, H, N} ;

int main()
{
	string S;
	cin >> S;

	miin state;
	
	int i = 0;
	state = N;
	int cnt = 0;
	while( i < S.size()  ) {
		switch( state ) {
		case M:
			if( S[i] == 'i' ) {
				state = I;
			}
			else {
				state = N;
			}
			break;
		case I:
			if( S[i] == '-' ) {
				state = H;
			}
			else if( S[i] == 'n' ) {
				cnt++;
				state = N;
			}
			else {
				state = N;
			}
			break;
		case H:
			if( S[i] == 'H' ) {
			}
			else if( S[i] == 'n' ) {
				cnt++;
				state = N;
			}
			break;
		case N:
			if( S[i] == 'm' ) {
				state = M;
			}
			break;
		}
		i++;
	}
	cout << cnt << endl;
}