#include<cstring>
#include<fstream>
using namespace std;

int main()
{
    freopen("text.in","r",stdin);
    ofstream fout("text.out");
    int nrc=0, nrl=0,last=0, acum;
    char ch;
    while(scanf("%c", &ch)!=EOF)
    {
        if((ch>='a' && ch<='z') || (ch>='A' && ch<='Z'))
        {
            nrl++;
            acum=1;
        }
        else
            acum=0;
        if(last==0 && acum==1)
            nrc++;
        last=acum;
    }
    fout<<nrl/nrc;
    return 0;
}