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[" Consider all functions "],[f:{1,2,3,4...

[" Consider all functions "],[f:{1,2,3,4}rarr{1,2,3,4}" which are one "-],[" one,on to and satisfy the property if "],[f(k)" is add then "f(k+1)" is even,"],[k=1,2,3" .If number of such solutions "],[" is "P" then "P-7=]

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