Use stack and queue, from the Standard Template Library (STL), to reverse the words in this; sentence

esU kcats dna eueuq, morf eht dradnatS etalpmeT yrarbiL (LTS), ot esrever eht sdrow ni siht ecnetnes.

There are 1234 letters in this essay.

Therefore, just do it

esU kcats dna eueuq morf eht dradnatS etalpmeT yrarbiL (LTS) ot esrever eht sdrow ni siht ecnetnes

esU kcats dna eueuq morf eht dradnatS etalpmeT yrarbiL ot esrever eht sdrow ni siht ecnetnes