#include <stdio.h>
int main(void){
	char S[101];
	int start = 0,goal = 100;	//	goalは100で固定
	int count = 0;
	
	scanf("%s",S);
	
	for(int i = start; S[i] != 0; i++){
		if((S[i] == 'm')&&(S[i+1] == 'i')){
			//	nを探す
			for(int j = i; S[j] != 0; j++){
				if(S[j] == 'n'){
					goal = j;
				}
			}
			//	判定
			if(goal != 100){
				count++;
				start = goal;
				goal = 100;		//	初期化
			}
		}
	}
	
	printf("%d\n",count);
	
	return 0;
}