#include<fstream>
#include<cstring>
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");
char s;
int lung,cuv,ok;
int main(){
    while( fin.get(s) ){
        if( ( 'A' <= s && s <= 'Z' ) || ( 'a' <= s && s <= 'z' ) ){
            lung++;
            ok = 1;
        }else{
            if( ok == 1 ){
                cuv++;
                ok = 0;
            }
        }
    }
    fout << lung/cuv;
    return 0;
}