#include<fstream>
#include<cstring>
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");
char s[10000003];
int n,i,lit,cuv,ok;
int main(){
    fin.getline(s,10000003);
    n = strlen(s);
    ok = 0;
    for( i = 0; i < n; i++ ){
        if( ( 'A' <= s[i] && s[i] <= 'Z' ) || ( 'a' <= s[i] && s[i] <= 'z' ) ){
            if(ok==0){
                cuv++;
                ok=1;
            }
            lit++;
        }else
            ok=0;
    }
    fout<<lit/cuv<<"\n";
    return 0;
}