A secure access control system at a biological research facility regulates entry based on clearance levels. The clearance codes are defined in the table below:

A program is written to process access requests at the security gate. The program:

• Asks the researcher to input their clearance code.
• Calls a prewritten function ValidateClearance() to verify if the entered code is valid.
• If the code is valid, the researcher is prompted to input their alphanumeric employee ID, which is concatenated with the clearance code to form a unique access token, and the function GrantAccess() is called.

01 clearanceLevel = input("Enter clearance code:")
02 if ValidateClearance(clearanceLevel) then
03     employeeID = input("Enter employee ID:")
04     accessToken = clearanceLevel + employeeID
05     GrantAccess(accessToken)
06 endif