Integer listSize is read from input, then listSize integers are read from input and stored in ArrayList tokensToPick. In createSequence$(),$ complete the recursive case to perform the following tasks:

Move the element at index i of remainTokens to the end of pickedTokens.

Recursively call createSequence$().$

Move the element from the end of pickedTokens back to index i of remainTokens.

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Note:

ArrayList.remove$($i$)$ removes the element at index i of ArrayList.

ArrayList.add$($i$,$ x$)$ adds x into ArrayList at index i$.$