#include <cctype>
#include <cstdio>
using namespace std;

int n,l,x=0;
char c;

int main(void){
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    while(scanf("%c",&c)!=EOF){
        if(isalpha(c)){
            if(x==0)
                ++n;
            ++x;
            ++l;
        }
        else
            x=0;
    }
    printf("%d",l/n);
    return 0;
}