#include <iostream>
#include <string.h>
#include <fstream>
using namespace std;
ifstream f("text.in");
ofstream g("text.out");
int main(){
    int nrap=0,nrcuv=0,nrcuvt,ml;
    char s[200];
    f.getline(s,200);
    for (int i=0;i<strlen(s);i++){
        if (s[i]!=' ' && s[i]!='!' && s[i]!=',' && s[i]!='-'){
            nrap+=1;
        }
    }
    for (int j=0;j<strlen(s);j++){
        if(s[j]==' ' || s[j]=='-'){
           nrcuv+=1;
        }
    }
    nrcuvt=nrcuv+1;
    ml=nrap/nrcuvt;
    g<<ml<<endl;
}