Dictionary doctors$\_$room contains key$-$value pairs that represent the room number of each doctor. Dictionary patient$\_$directory contains key$-$value pairs that represent the patient in each room. String doctor$\_$name is read from input. Complete the following tasks:

Assign room$\_$num with the value associated with key doctor$\_$name in doctors$\_$room. Any string that is not a key in doctors$\_$room has default value $-999.$

Use pop$()$ to remove room$\_$num from patient$\_$directory and assign patient$\_$name with the value returned. Any number that is not a key in patient$\_$directory has default value $\text{'}$no one'.