#include<fstream>
#include<string.h>
#include<ctype.h>
using namespace std;
ifstream in("text.in");
ofstream out("text.out");
char s[1100000],d=26;
int main(){
int n,i,nrcuv,nrlit,lmed;
in.get(s,1100000,d);
n=strlen(s);
nrcuv=nrlit=0;
if(isalpha(s[0]))
	nrlit=nrcuv=1;
for(i=1;i<n;i++)
	if(isalpha(s[i])){
		nrlit++;
		if(isalpha(s[i-1]))
			nrcuv++;
	}
lmed=nrlit/nrcuv;
out<<lmed;
return 0;
}