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The Fingerprint Lock with Blocker

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The fingerprint lock has a logic mechanism checking the order used by the user, then he put his fingers on the fingerprint reader.
For example,
Someone must use the left-hand index finger two times, after this right-hand index finger one time, after this  left-hand   ring finger two times, after this  right-hand thumb two times.
If the sequence was in the right order the lock will open.

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