#include<fstream.h>
#include<string.h>
int main(){
char v[1025];
int i,cuv=1,litere=0;
ifstream f("text.in");
f.getline(v,1024);
ofstream g("text.out");
for(i=0;i<strlen(v);i++){
 if(v[i]==' '){
  cuv++;
  litere++;
 }
 if(v[i]=='!'||v[i]=='\n'||v[i]=='-')
  litere++;
 }
 g<<(strlen(v)-litere)/cuv;
 g.close();
 f.close();
 return 0;
}