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The Answer is 9

because in a multiset each duplicate is considered as a distinct element in a multiset.

If the above was given for a set the answer would be 4 ( M,A,L,Y)

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Bikram asked Feb 9, 2017
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The maximum length of cycles in a digraph of partial order on $G$ having $p$ elements is _______: $p$ $p^{-1}$ $1$ $2^{p}$