#include<fstream>
#include<string>
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");

int main(){
	char s[1100000];
	int i,nrl=0,nrc=0,n;
	fin.get(s,1100000);
	fin.get();
	n=strlen(s);
	if(isalpha(s[0]))nrl++;{
					nrc++;}	
	for(i=0;i<n;i++){if(isalpha(s[i]))nrl++;
					if(!isalpha(s[i-1]))nrc++;}
	fout<<nrl/nrc;
}