#include<cstdio>
#include<cstring>
#include<iostream>
using namespace std;
int i,cate,nrc,g,n;
char a[1000001];
int main()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    cin.get(a,1000001);
    cin.get();
    n=strlen(a);
    cate=0;
    nrc=0;
    for(i=0;i<=n-1;i++)
    {
        if(strchr("acdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ",a[i])!=0)cate++;
        if(strchr("acdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ",a[i])==0&&strchr("acdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ",a[i+1])!=0)nrc++;
    }
    if(strchr("acdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ",a[0])!=0)nrc++;
    g=cate/nrc;
    printf("%d\n",g);
}