#include <fstream>
#include <string.h>
using namespace std;
int main()
{
    ifstream f("text.in");
    ofstream g("text.out");
    char s[255], *cuvant;
    int nr=0, nr1=0;
    f.getline(s, 255);
    cuvant=strtok(s, "- ,.?!,");
    while(cuvant!=NULL) {
        nr1+=strlen(cuvant);
        nr++;
        cuvant=strtok(NULL, "- ,.?!,");
    }
    g<<nr1/nr;
}