Create variable unique$\_$names as an empty set so that four strings can be read from input and added to unique$\_$names.

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Ex: If the input is:

Tia

Cam

Eve

Tia

then the output is:

$[\text{'}$Cam$\text{'},$ 'Eve', 'Tia'$]$

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