The first hint to crack the puzzle "Ventilation is exchange of __ for carbon dioxide" is:
It is a word which contains 6 letters
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The second hint to crack the puzzle "Ventilation is exchange of __ for carbon dioxide" is:
It starts with letter o
o
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The third hint to crack the puzzle "Ventilation is exchange of __ for carbon dioxide" is:
It ends with letter n
o
n
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Looking for extra hints for the puzzle "Ventilation is exchange of __ for carbon dioxide"
o
n
Click on any empty tile to reveal a letter
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The answer for the puzzle "Ventilation is exchange of __ for carbon dioxide" is:
o
x
y
g
e
n
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