String Limitation

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdbool.h>
int main(void) {
  const char *string[] = {"abcdefg", "abc,defg", "12abcdefghi", "ABCDE"};
  for (int i = 0; i < sizeof(string) / sizeof(char *); i++) {
    int len = strlen(string[i]);
    printf("String: %s, length: %d", string[i], len);
    if (len < 5 || len > 10) {
      puts("");
      continue;
    }
    bool except = false;
    for (int j = 0; string[i][j]; j++)
      if (!isalnum(string[i][j])) except = true;
    if (except) {
      puts("");
      continue;
    }
    puts(", week");
  }
}