#include <cstdio>
#include <cstring>
using namespace std;
char s[1000001];
int main()
{
    int nr=0,cuv=0,n,i;
    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'))
    {
        nr++;
        if((s[i-1]<'a'||s[i-1]>'z')&&(s[i-1]<'A'||s[i-1]>'Z'))
        cuv++;
    }
    printf("%d",nr/cuv);
    return 0;
}