Each dinner at Restaurant \(X\) includes a pair of side dishes, which a customer chooses by selecting any one side

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Each dinner at Restaurant \(X\) includes a pair of side dishes, which a customer chooses by selecting any one side dish from list \(A\) and any one side dish from list \(B.\) There are a total of \(18\) possible pairs of side dishes, and no side dish appears on both lists. If there are fewer side dishes on list \(A\) than on list \(B,\) how many side dishes are on list \(B?\)

1) There are a total of \(9\) side dishes on the two lists

2) There are a total of \(3\) side dishes on list \(A\)

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