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The first hint to crack the puzzle "Pre-calculator counting device" is:

It is a word which contains 6 letters

      

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The second hint to crack the puzzle "Pre-calculator counting device" is:

It starts with letter a

a      

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The third hint to crack the puzzle "Pre-calculator counting device" is:

It ends with letter s

a      s

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Looking for extra hints for the puzzle "Pre-calculator counting device"
a      s
Click on any empty tile to reveal a letter

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The answer for the puzzle "Pre-calculator counting device" is:
a b a c u s

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