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