#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main() {
FILE *f1 = fopen("text.in", "r");
FILE *f2 = fopen("text.out", "w");
char *a = (char *) malloc (6500000 * sizeof (char));
fgets(a, 6500000, f1);
int nr_cuv = 0;
int lung_t = 0;
char *cuv = (char *) malloc (30 * sizeof(char));
char sep[] = ",./;'[]`~!@#$^& *()_+}{><?-=\n\0";
cuv = strtok(a, sep);
while(cuv) {
nr_cuv++;
lung_t += strlen(cuv);
cuv = strtok(0, sep);
}
fprintf(f2, "%d\n", lung_t/nr_cuv);
fclose(f1);
fclose(f2);
return 0;
}