Fast Food Ordering System

You are required to simulate a fast food ordering system. The system processes two types of commands:

• ORDER id priority: Add a new order with an identifier id and an integer priority. Here, a lower number indicates a higher priority.
• PROCESS: Process the order with the highest priority. If two orders have the same priority, the one that was received earlier is processed first. If there are no orders to process, output NO ORDER.

For example, given the sequence of commands:

ORDER A1 3
ORDER B2 1
ORDER C3 2
PROCESS
PROCESS
PROCESS

the expected outputs would be:

B2
C3
A1

Use a priority queue where the ordering is defined by the pair \( (priority, counter) \) with counter representing the order in which the commands were received.

inputFormat

The input is provided via standard input (stdin) and contains multiple lines. Each line represents a command, which is either:

• ORDER id priority
• PROCESS

Process the input until the end of file (EOF).

outputFormat

For each PROCESS command in the input, output the identifier of the order processed. If no order is available, output NO ORDER. The outputs should be printed via standard output (stdout), each on a new line.

## sample

ORDER A1 3
ORDER B2 1
ORDER C3 2
PROCESS
PROCESS
PROCESS

B2
C3
A1

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