#include<cstdio>
#include<string>
#include<ctype.h>
#define infile "text.in"
#define outfile "text.out"
#define L 1000005 
using namespace std;

void citeste();
void rezolva();
void afiseaza();

char s[L];
int n;
int nr=0;
int len=0;

void citeste()
{
	freopen(infile,"r",stdin);
	
	gets(s);
	n=strlen(s)-1;
	
	fclose(stdin);
}


void rezolva()
{
	
	for(int i=0;i<=n;i++)
	{
		int j=i;
		while(isalpha(s[j])) j++, len++;
		if(j>i) nr++, i=j-1;
	}
	
	n=len/nr;
}




void afiseaza()
{
	freopen(outfile,"w",stdout);
	
	printf("%d",n);
	
	fclose(stdout);
}


int main()
{
	citeste();
	rezolva();
	afiseaza();
	
	return 0;
}