Set numbers$\_$remaining is initialized with three numbers read from input. Remove a random element from numbers$\_$remaining. Then, assign num$\_$numbers with the number of elements in numbers$\_$remaining.

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Ex: If the input is:

$18$

$20$

$43$

then the output is:

Number of values remaining: $2$

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