#include <bits/stdc++.h>
using namespace std;
char c;
unsigned long long nrL,nrCuv;
bool acc=0;

void cit()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
}
int main()
{
    cit();
    scanf("%c",&c);
    while(c!='\n')
    {
        if((c>='a' && c<='z') || (c>='A' && c<='Z')) {
                 nrL++;
                 acc=1;
            }
        else if(acc)
        {
            nrCuv++;
            acc=0;
        }
        scanf("%c",&c);
    }
    if(acc)nrCuv++;
    if(nrCuv!=0)
    printf("%llu",nrL/nrCuv);
    else printf("0");

    return 0;
}