#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define max 10000
int calc(char* s);

int isLet(char l);

int main()
{
    FILE* in = fopen("text.in","r");
    FILE* out = fopen("text.out","w");

    char *s = (char*)malloc(sizeof(char)*max);

    fgets(s,max,in);
    printf("%s",s);

    int c = calc(s);
    fprintf(out,"%d",c);
    return 0;
}

int calc(char* s){

    int nrWords=0;
    int length = 0;
/*
    char * tok = strtok(s," `~1234567890!{@#$%^&**()-}|\":+?=><,./;'[]\"");

    while(tok!=NULL){
        length += strlen(tok);
        nrWords++;
        tok=strtok(NULL, " `~1234567890!{@#$%^&**()-}|\":+?=><,./;'[]\"");
    }
*/
    int size = strlen(s);
    int i;
    int word = 0;
    for(i=0; i<size;i++){
        if(isLet(s[i])){
            if(!word){
                word=1;
                nrWords++;
            }
            length++;
        }else{
            if(word){
                word=0;
            }
        }
    }
    return length/nrWords;

}

int isLet(char l){
    return l >= 65 && l<= 122;
}