Each employee has an id number in "BBB" company. The id is a 10 digit number, holding the following information from left to right: * The first 2 digits are the year in which the employee was hired [00-99]. * The next 2 digits are the department [01-20]. * The next 2 digits are the position of the employee [10-90] * The next 2 digits are employee's birthday month [01-12] * The next 2 digits are employee's birthday year [00-99] Return true if the given string is a correct id number.