#include <stdio.h>
#include <ctype.h>
#include <string.h>
char sir[1000004];
char litere[100]="ABCDEFGHIJKLMNOPQRSTUVWXYZ";

long lungime,spatii,cuvinte;

int litera(char a){
int i;
a=toupper(a);
 for(i=0;i<26;i++){if(a==litere[i]) return 1;}
 return 0;
}

void citire(){
		 FILE *in;
		 sir[0]=' ';
     int i=1;
     char a;
     in=fopen("text.in","r");
     while(!feof(in)){fscanf(in,"%c",&a);
                      if(litera(a)){sir[i]=a; i++;lungime++;}
                      else
                      if(sir[i-1]==' ') continue;
                      else {sir[i]=' ';i++;cuvinte++;}
                      }
     fclose(in);
     }

/*void procesare(){
long i,j,k=0;
		 for(i=1;i<strlen(sir);i++){
		 j=i-1;
				if(
				(sir[i]==' '||sir[i]=='-'||sir[i]=='!'||sir[i]=='?'||sir[i]==','||sir[i]=='.')
						&&
				(sir[j]==' '||sir[j]=='-'||sir[j]=='!'||sir[j]=='?'||sir[j]==','||sir[j]=='.')
				)continue;
				else {if(sir[i]==' '||sir[i]=='-'||sir[i]=='!'||sir[i]=='?'||sir[i]==','||sir[i]=='.'){
						 sir1[k]=' ';spatii++;}
						 else  sir1[k]=sir[i];
											 }
					k++;}
				 sir1[k+1]='\0';
          
     }
*/
void scriere(){
		 FILE *out;
		 out=fopen("text.out","w");
		 fprintf(out,"%ld", lungime/cuvinte);
     }
int main(){
    citire();
  //  procesare();
    scriere();    
 return 0;   
}