#include <cstdio>
#include <cstring>

const int dim=(2<<10)+5;
char s[dim];
long long n=0,nc=0,l=0,x=0,i=0;

int main()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);

    fgets(s,dim,stdin);
    n=strlen(s);
    for (i=0; i<n; ++i)
        if ((s[i]>='a' && s[i]<='z') || (s[i]>='A' && s[i]<='Z'))
        {
            if (x==0)
                ++nc;
            x=1;
            ++l;
        }
        else
            x=0;

    printf("%lld\n",l/nc);

    return 0;
}