# include <cstdio>
# include <cstring>

int main () {

	freopen ("text.in", "r", stdin);
	freopen ("text.out", "w", stdout);

	char c;
	
	scanf("%c", &c); 
	
	
	int len = 0, cuv = 0, k = 0;

    while ( !feof(stdin) ){
		
		if ( c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z'){
			len = len + 1;
			if ( k == 0){
				cuv = cuv + 1;
			}
			k = 1;
		}else k = 0;
		scanf("%c", &c); 
	}
	
	printf ("%d", len/cuv);


return 0;
}