[up to table of plane face-up shapes]
⧄ E1 E N1 N S2 W S2 W
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Start from
.
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The move from here requires a fair amount of stretching (but it can be done safely)
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Locate the vertical tile farthest away from the flap, it is positioned in the back and
connected with valley folds at two adjacent sides with the other tiles
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That tile has to become a flap, this can be done by pushing the adjacent tile hinged
at the bottom side against it, lift the resulting tile in the final position.