#include <cstdio>
#include <cstring>
#include <fstream>
using namespace std;
ifstream f("text.in");
FILE *g=fopen("text.out","w");
char s[1000000];
int nrcuv=-1,i,n,lcuv;
int main()
{
f.getline(s,1000000);
n=strlen(s);

while (i<n) {while (i<n&&not('A'<=s[i]&&s[i]<='z')) i++;
              nrcuv++;
              while (i<n&&'A'<=s[i]&&s[i]<='z') {lcuv++;
                                            i++;}
              }
fprintf(g,"%d\n",lcuv/nrcuv);
return 0;
}