#include <fstream>
#include <cstring>

using namespace std;

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

int main()
{
    char s[100];
    int n,i,nrl=0,nrc=0;
    fin.getline(s,100);
    n=strlen(s);
    for(i=0;i<=n-2;i++)
    {
        if(isalpha(s[i])) nrl++;
        if(isalpha(s[i])&&!isalpha(s[i+1])) nrc++;
    }
    if(nrc>0)fout<<(int)nrl/nrc;
    else fout<<"0";
    return 0;
}