# =-=-=-= DAY 87 [Hard] =-=-=-=
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# A rule looks like this:
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# A NE B
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# This means this means point A is located northeast of point B.
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# A SW C
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# means that point A is southwest of C.
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# Given a list of rules, check if the sum of the rules validate. For example:
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# A N B
# B NE C
# C N A
