#include <fstream>
#include <cstring>

using namespace std;
FILE *f,*g;
char c;
bool litera(char c) {return(c>=65&&c<=90)||(c>=97&&c<=122);}
int main()
{   f=fopen("text.in","r");
    g=fopen("text.out","w");
    int ok=0,lit=0,cuv=0;
    while (fscanf(f,"%c",&c)!=EOF)
    {   if (litera(c))
        {   lit++;
            if (ok==0)
            cuv++;
            ok= 1;
        }
        else ok=0;
    }
    fprintf(g,"%d\n",lit/cuv);
    return 0;
}