#include <cstdio>
char ch;
int n,nr=0,sw=0;
int main(){
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    while (!feof(stdin)) {scanf("%c",&ch);
                          if (('a'<=ch && ch<='z')||('A'<=ch && 'Z'>=ch))
                            {n++;
                             if (!sw) nr++;
                             sw=1;}
                            else sw=0;
                          }
    printf("%d",n/nr);
    return 0;
}