find a closed form for this INTIMIDATING SEQUENCE

FEEEE FIII FOOO FIDDLE! ANSWER ME THIS FAMOUS RIDDLE!
"Voiceless it cries,
Wingless flutters,
Toothless bites,
Mouthless mutters."

Chalkboard and Eraser were nearing the end of their...let's call it the Legally Distinct There and Back Again adventure when they were confronted by the Legally Distinct Gollum, a swamp troll. It screamed again.

FEEEE FIII FOOO FIDDLE! ANSWER ME THIS FAMOUS RIDDLE!
"Voiceless it cries,
Wingless flutters,
Toothless bites,
Mouthless mutters."

If you've read this far and really expect some cogent or reasonable conclusion to this story then perk up buttercup! Because once,

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