#include<iostream.h>
#include<fstream.h>
#include<string.h>
ifstream f("text.in");
int i, lungimeT lungimeM, nrCuv;
char sir[255], aux[255], *p, separatori[]=", . ! ? - ",cuvinte[255];

int main()
{
	f.get(s,255);
	strcpy(aux,s);
	
	p=strtok(aux,separatori);
	
	while(p)
	{
		strcpy(cuvinte[++nrCuv],aux);
		p=(NULL,separatori);
	}
	
	for(i=1;i<=nrCuv;i++)
			lungimeT=lungimeT+strlen(cuvinte[i]);
	
	lungimeM=lungimeT/nrCuv;
	
	cout<<lungimeM;
}