#include <cstdio>
#include <cstring>
using namespace std;
int i,j,n,nr,lg;
char a[1024*1024+10];
int main()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    gets(a);
    n=strlen(a);
    i=0;
    while(i<n)
    {
        if((a[i]>='a'&&a[i]<='z')||(a[i]>='A'&&a[i]<='Z'))
        {
            while((a[i]>='a'&&a[i]<='z')||(a[i]>='A'&&a[i]<='Z'))
            {
                i++;
                lg++;
            }
            nr++;
        }
        i++;
    }
    printf("%d",lg/nr);
    return 0;
}