$3\mathrm{.}4\mathrm{.}1$: Set basics.

$547148\mathrm{.}3126750.$qx$3$zqy$7$

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Set animals$\_$set$1$ contains 'wasp'. Set animals$\_$set$2$ contains two strings read from input. Perform the following tasks:

Update animals$\_$set$1$ with animals$\_$set$2.$

Remove 'urchin' from animals$\_$set$1.$

Read the next string from input and add the string to animals$\_$set$1.$

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Note: Because sets are unordered, the sets are printed using the sorted$()$ function here for comparison.