In the blanks following each line of the poem, write the letter that denotes the rhyme scheme of "the tide rises, the tide falls."

the tide rises, the tide falls,

the twilight darkens, the curlew calls;

along the sea-sands damp and brown

the traveler hastens toward the town,

and the tide rises, the tide falls.

darkness settles on roofs and walls,

but the sea in the darkness calls and calls;

the little waves, with their soft, white hands,

efface the footprints in the sands,

and the tide rises, the tide falls.

the morning breaks; the steeds in their stalls

stamp and neigh, as the hostler calls;

the day returns, but nevermore

returns the traveler to the shore,

and the tide rises, the tide falls.

--henry wadsworth longfellow