#include <stdio.h>
#include <string.h>
#include <ctype.h>


int main(void)
{
int ch=0;
int up=0,a=0,b=0;
int count=0,let=0;
double pj;

while((ch=getchar())!=EOF)
{
a=isalpha(up);
if(a)a=1;
b=isalpha(ch);
if(b){b=1;let++;}
if(a==0&&b==1)count++;
up=ch;
}
pj=(double)let/(double)(count);
printf("字母：%d个\n单词：%d个\n平均：%f个\n",let,count,pj);
 

return 0;

}