DEAR DEEPAKDIVYANSHU.......WHICH POEM ARE YOU TALKING 'BOUT ???????/
Normally.......the rhyme scheming of a poem is done by coding the last words of each line with letters, according to the words to which they rhyme.
Example......
TWINKLE TWINKLE LITTLE STAR - a [ first, take the last word of the first sentence....which is 'star'. Then, code it as 'a'. Check if any other
HOW I WONDER WHAT YOU ARE - a word rhymes with star. 'Are', rhymes with star....so code that as 'a' too. Check for more words
UP ABOVE THE WORLD SO HIGH - b that rhyme with these two. No? Then go to the next letter 'b'. Our next word is 'high'. 'Sky' rhymes
LIKE A DIAMOND IN THE SKY - b high.....so code both of them as b. Then....read the alphabets in top-to-bottom order. HERE, OUR RHYME SCHEME IS aabb.
