Day 21 Notes

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| Part 1 |
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$ elixir day21part1.exs
1829

+--------+
| Part 2 |
+--------+

$ elixir day21part2.exs
sp contains peanuts
gkcqxs contains fish
krjn contains shellfish
bpbdlmg contains soy
mxkh contains dairy
bvh contains nuts
rgc contains sesame
tdbcfb contains wheat
mxkh,gkcqxs,bvh,sp,rgc,krjn,bpbdlmg,tdbcfb


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| Overall Thoughts |
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Not much to say about this problem. I didn't really enjoy it much.
I mostly just fiddled about with the data until it reduced down to the
required information.

The process of elimination - identifying the allergen with just 1 ingredient
and using that to decude the other options, was very similar identifying the tickets
in Day 16.