#include <cstdio>
#include <cstring>
using namespace std;
int n,nr,i,prec,nrcuv;
char s[100100000];
int main()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    gets(s);
    n=strlen(s);
    for (i=0;i<n;i++)
    {
        if ((s[i]>='A' && s[i]<='Z')||(s[i]>='a' && s[i]<='z'))
            {
                if (prec==0) {nr++;prec=1;}
                nrcuv++;
            }
        else
            prec=0;
    }
    printf("%d\n",nrcuv/nr);
    return 0;
}