Question: Convert to string nested

Suppose i have a set say



if i want to convert A to set such that {"{"1"."8"}","{"1","4"}","{"1","10"}"}  where each element is a string with minium time I have given a small set here i may have set with 48 to 100 such element that is s set of sets i want to convert the inside sets to strings without much of looping in minimum time can any one help

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