#include <bits/stdc++.h>

using namespace std;

ifstream fin("text.in");
ofstream fout("text.out");

#define d 1024*1024+1
char text[d];
int nrl, nrc, i=1;

int main()
{
    fin.getline(text,d);

    if(isalpha(text[0]))
        nrl++;
    for(i=1;i<strlen(text);i++)
    {
        if(isalpha(text[i]))
            nrl++;
        else if(!isalpha(text[i])&&isalpha(text[i-1]))
            nrc++;
    }
    if(isalpha(text[i]))
        nrc++;

    if(!nrc)
        fout<<0;
    else
        fout<<nrl/nrc;

    return 0;
}