Document Length Is Shorter than A5 (Portrait)
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Lift up the stopper.
ATTENTION
Do not lift up the stopper more than 90 degrees, because it may break.
HINTIf the stopper comes off, attach it by inserting the protrusion on one side of the stopper into the hole where it was originally attached in the direction of arrow 1, and then inserting the protrusion on the other side in the direction of arrow 2.