#include <stdio.h>

using namespace std;

long long L = 0;
int l = 0, start = 0, nrcuv = 0;
char ch;
int main(){
	freopen("text.in", "r", stdin);
	freopen("text.out", "w", stdout);
	scanf("%c", &ch);
	if(((int)ch>64&&(int)ch<91)||((int)ch>96&&(int)ch<123)){		
		L = start =1;
	}
	while(!feof(stdin)){
		scanf("%c", &ch);
		if(('a'<=ch && ch<='z') || ('A'<=ch && ch<='Z')){		
			if( start != 1 ){
				start = 1; L++;
			}else{
				L++;
			}
		}else{
			if( start == 1 ){
				start = 0; nrcuv++;
			}
		}
	}
	nrcuv = L / nrcuv;
	printf( "%d", nrcuv);
}
//- Lasa-ma in pace, ca am invatat azi noapte toata ziua!