The poet has created an irregular rhyming scheme hence has no fixed pattern of words. That's a,b,c,d,e,f,g,h and so on.Drawing examples from the poem we have grass and excess whereby grass is in line 14 and excess in line 18, excusing line 17 and singing line 19 also there's windsock in line 10 and Woodstock in line 19.
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How does the poet create rhythm in the poem?(sudden yellow sign)what devices does he use,and how do these devices work.identify one device