#include <iostream.h>
#include <fstream.h>
#include <string.h>
ifstream f ("text.in");
ofstream g ("text.out");
int main()
{
    char a[100],sep[20]=" -,./;",*p;
    int i,nr=0,x,n=0,j=0;
    f>>a;
    n=strlen(a);
    j=n;
    for(i=0;i<n;i++)
    if(a[i]==' ' || a[i]=='-') j--;
    p=strtok(a,sep);
    while(p!=NULL)
    {
                  nr++;
                  p=strtok(NULL,sep);
    }
    j=n;
    for(i=0;i<n;i++){
                    if(a[i]==' ' || a[i]==',' || a[i]=='.' || a[i]=='?' || a[i]=='!') {j--;} 
	}    
x=j/nr;
    g<<x;
    return 0;
}