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Favorites
Players
Puzzles
Ota
Ota Puzzles
Collected
Started
Ota Puzzles
All Levels, 41
Impossible, 0
Very hard, 0
Hard, 6
Medium, 28
Easy, 3
For babies, 4
Graphical representation of formulas
4.4
1442
Alien planets
4.7
26K
Hallstatt
4.8
39K
Lake Aubert
4.6
201K
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