#include <iostream>
#include <fstream>
#include <string.h>
using namespace std;

int valid(char x)
{
if(x>='a' && x<='z' || x>='A' && x<='Z')
    return 1;
return 0;
}

int main()
{char s[1000],a;
long long nr=0,cuv=0;
int n,i;
ifstream f("text.in");
ofstream g("text.out");
f>>a;
if(valid(a)==1)
    nr++;
while(f>>s)
    {n=strlen(s);
    for(i=0;i<n; i++)
        {if(valid(s[i])==1)
            nr++;
        if(s[i]=='-' && valid(a)==1)
            cuv++;
        a=s[i];}
    cuv++;
    }
g<<nr/cuv;

return 0;
}