text: /**
   * rot13 - description
   * @str: string
   * Return: string
   */
  char *rot13(char *str)
  {
  	char *keysrc = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
  	char *keydst = "nopqrstuvwxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM";
  	int i, carry = 0;
  
  	while (str[carry])
  	{
  		for (i = 0; keysrc[i]; i++)
  			if (str[carry] == keysrc[i])
  			{
  				str[carry] = keydst[i];
  				break;
  			}
  		carry++;
  	}
  	return (str);
  }
  