#include <stdio.h>

int main(){
    char str_min[100];
    int count = 0;
    int i = 0;
    int j = 2;
    scanf("%s", str_min);
    while(1){
        if(str_min[i] == '\0'){
            break;
        }else{
            if(str_min[i] == 'm' && str_min[i + 1] == 'i'){
                while(1){
                    if(str_min[i + j] == '-'){
                        j++;
                    }else if(str_min[i + j] == 'n'){
                        count++;
                        j = 0;
                        break;
                    }else{
                        j = 0;
                        break;
                    }
                }
            }
            i++;
        }
    }
    printf("%d\n", count);
}