$$41016\mathrm{.}3900880.qx3zqy7$

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Dictionary room$\_$guests contains two key$-$value pairs, each representing a hotel room number and the guest's name. Read a room number from input. Then, output the corresponding guest's name from room$\_$guests. Finally, delete that pair from room$\_$guests.

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Ex: If the input is $713,$ then the output is:

Kai

Remaining pairs:

$\{331$: 'Taj'$\}$

$1$ room$\_$guests 'Taj', $713$: 'Kai'