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11820
Beach
Very easy
11821
Investments
Very easy
11822
Sensors
11823
Triples
11824
Substrings
11825
Towers
11826
Islands
11828
Watermelons
11829
Anagram groups
Easy
11836
Epic Coloring
11837
XORSUM
11838
333 Permutation
11839
Constructive Fun
11840
Tree Sum is Fun II
11841
Good Dish
11842
Super-rocky Terrain
11843
Catch me if you can
11844
Kvantocryptarithm
11845
Countdown
11846
Chronicles of the Archivist R2-A2
11847
Wall of Mordor --- Mission Impossible
11848
The Great Chambers of the Pyramid of Cheops
11853
Unique ID
11854
Quad
11855
Doya and XOR
1
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