algs4partII-004/wordnet: WIP

Compilation:  PASSED
Style:        PASSED
Findbugs:     No potential bugs found.
API:          PASSED

Correctness:  19/35 tests passed
Memory:       2/2 tests passed
Timing:       4/10 tests passed

Aggregate score: 55.29% [Correctness: 65%, Memory: 10%, Timing: 25%, Style: 0%]

Signed-off-by: vinsonlee <vinsonlee@users.noreply.github.com>