Question

Write a function that takes two arrays of strings and returns the longest string found in either array?
function solve( a, b ){ //write your code here }
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Examples

The function solve(arr1, arr2) takes two arrays of strings, combines them, and returns the longest string among all.

input:["boqKY", "sQhJW", "wpwD", "AXBNr"],["ZYXK", "hrC", "KEmgC", "DJj"] 
output:"boqKY"   

input: ["OiLUY", "FgxZEb", "jRfBnhP"] , ["zHz", "GcS"] 
ouptut: "jRfBnhP"