#include <fstream>
#include <ctype.h>
#include <cstring>

std::ifstream fin("text.in");
std::ofstream fout("text.out");
char v[1050000];
int len, cuv, k;
int main(){
	fin.getline(v, 1050000);
	for (int i = 0; i < strlen(v); i++){
		if (isalpha(v[i])){
			len++;
			if (k == 0)
				cuv++;
			k = 1;
		}
		else
			k = 0;
	}
	fout << len / cuv << "\n";
	return 0;
}