Arrangements with Odd‑Place Letters

In how many ways can the letters of the word *novels* be arranged if the letters $o$ and $e$ must occupy odd positions?

~4 minAnswer checked instantlypermutationsrestricted positions

H. S. Hall & S. R. Knight, Higher Algebra (1891) · Ch. XI. Permutations and Combinations, Examples XI.a, No. 17

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