#include<stdio.h>
#include<ctype.h>
void solve(){
    int s=0,k=0;
    char prev,next;
    scanf("%c",&prev);
    if(isalpha(prev)){
        ++k;
        ++s;}
	while(scanf("%c",&next)!=EOF){
		if(isalpha(next)&&isalpha(prev))
			++s;
		else if(isalpha(next)&&!isalpha(prev)){
			++k;
			++s;}
		prev=next;}
    printf("%d",s/k);}
int main(){
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    solve();
    return 0;}