#include <cstdio>

using namespace std;
long s,cuv,r;
char c;
int main()
{
freopen("text.in","r",stdin);
freopen("text.out","w",stdout);
scanf("%c",&c);
while (c>29)
    {
    if (((c>='a')&&(c<='z'))||((c>='A')&&(c<='Z')))
        {
        if (cuv==0) r++;
        cuv=1; s++;
        }
        else
        cuv=0;
    scanf("%c",&c);
    }
printf("%ld",s/r);
return 0;
}