#include <stdio.h>
#include <string.h>

int main(){
    char str[101] = {'\0'};
    int len, i;
    int cnt = 0;
    int state = 0;

    scanf("%s", str);
    len = strlen(str);
    for(i = 0; i < len; i++){
        if(state == 0){
            if(str[i] == 'm'){
                state = 1;
                continue;
            }
        }
        if(state == 1){
            if(str[i] == 'i'){
                state = 2;
                continue;
            }
        }
        if(state == 2){
            if(str[i] == '-'){
                state = 2;
            }else if(str[i] == 'n'){
                state = 0;
                cnt++;
            }
            continue;
        }
    }

    printf("%d\n", cnt);

    return 0;
}