List months$\_$list is created with the first three integers read from input. Then, new$\_$month is initialized with the last integer read from input. Update the third element in months$\_$list with new$\_$month.

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Ex: If the input is:

$6$

$2$

$7$

$9$

then the output is:

$9$ is at index $2$ of $[6,2,9]$