#include <fstream>
#include <cstring>
using namespace std;
ifstream f("text.in");
ofstream g("text.out");
int main()
{char s[1000];
f.get(s,1000);
int n=strlen(s),i,cuv=0;bool ok=0;
for(i=1;i<=strlen(s);i++)
    if(!isalpha(s[i]))
        {n--;
        if(ok)
        if(s[i]==' ' or (isalpha(s[i-1]) and isalpha(s[i+1]) and s[i]=='-'))
            cuv++;}
        else ok=1;
g<<n/(cuv+1);
    return 0;
}