using namespace std;
#include <fstream>
#include <string.h>
#include <ctype.h>
ifstream fin("text.in");
ofstream fout("text.out");
int main()
{
char x[1048577];
int n,nr=0,i;
fin.getline(x,1048577);
n=strlen(x);
for(i=0;x[i];i++)
  {
  if (isalpha(x[i]))
    {
	  while (isalpha(x[i]))
	     i++;
	  nr++;
	}
  }
fout<<n/nr;
return 0;
}