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Orientation

A tetromino's orientation, with regards to Tetris refers to the different ways that tetromino can exist after rotations.

Normally all the tetrominoes have a total of nineteen orientations, but probably to make things more symmetric, newer games add six orientations: two for S, Z, and I.

Orientations can be described either by the way they point (especially for T, which at least one reviewer has compared to a finger gesture[1]) or by the way the longest flat side faces.

Point up
Flat down
Point right
Flat left
Point down
Flat up
Point left
Flat right
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....OO....
....OO....
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....OO....
....OO....
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....OO....
....OO....
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....OO....
....OO....
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...IIII...
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.....I....
.....I....
.....I....
.....I....
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...IIII...
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....I.....
....I.....
....I.....
....I.....
....T.....
...TTT....
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....T.....
....TT....
....T.....
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...TTT....
....T.....
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....T.....
...TT.....
....T.....
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....SS....
...SS.....
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....S.....
....SS....
.....S....
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....SS....
...SS.....
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...S......
...SS.....
....S.....
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...ZZ.....
....ZZ....
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.....Z....
....ZZ....
....Z.....
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...ZZ.....
....ZZ....
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....Z.....
...ZZ.....
...Z......
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...J......
...JJJ....
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....JJ....
....J.....
....J.....
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...JJJ....
.....J....
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....J.....
....J.....
...JJ.....
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.....L....
...LLL....
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....L.....
....L.....
....LL....
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...LLL....
...L......
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...LL.....
....L.....
....L.....
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