#include <bits/stdc++.h>

using namespace std;
char c;
int n,i;
//ofstream fout("text.out");
bool litera(char c)
{
    if((c>='a'&&c<='z')||(c>='A'&&c<='Z'))
        return 1;
    return 0;
}
int main()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    //FILE *pfile;
    //pfile=fopen("text.out","w+");
    bool ok=0;
    int  lungime=0,cuvinte=0;
    while( scanf("%c",&c) == 1)
    {

        if(litera(c)==1)
        {
            lungime++;
            ok=1;

        }
        else if(ok==1)
        {
            ok=0;
            cuvinte++;

        }
    }
    printf("%d",lungime/cuvinte);
    //cout<<lungime/cuvinte;
    return 0;
}