#include <fstream>
#include <cstring>
using namespace std;
ifstream fi("text.in");
ofstream fo("text.out");
char S[1048577];
int nrc,nrs,nrl,i;
int main()
{
    fi.getline(S,1048577);
    for(i=1;i<strlen(S);i++)
    {
        if(isalpha(S[i])!=0 && isalpha(S[i-1]) == 0)
            nrc++;
        if(isalpha(S[i]))
            nrl++;
    }
    fo<<nrl/nrc;
    fi.close();
    fo.close();
    return 0;
}