#include <cstdio>
#include <cstring>
#include <iostream>
using namespace std;
int i,nrl,bun,nrc;
char a[1000000];
int main()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    /*i=-1;
    while(a[i]!='\n')
    {
        i++;
        scanf("%c",&a[i]);
    }*/
    cin.get(a,1000000);
    cin.get();
    nrl=0;
    nrc=0;
    //bun=0;
    if(strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz",a[0])==0)nrc++;
    for(i=0;i<=strlen(a)-1;i++)
        {
            if(strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz",a[i])!=0)nrl++;
            if(strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz",a[i])==0&&strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz",a[i+1])!=0)nrc++;
        }
    if(nrl==0)printf("0\n");
    else printf("%d",nrl/nrc);
    return 0;
}