text: def in_array(array1, array2):
  	found = set()
  	for ar2 in array2:
  		for ar1 in array1:
  			if ar2.find(ar1) != -1:
  				found.add(ar1)
  	foundlist = list(found)
  	foundlist.sort()
  	return foundlist
  
  
  arr1 = ["arp", "live", "strong"]
  arr2 = ["lively", "alive", "harp", "sharp", "armstrong"]
  print(in_array(arr1, arr2))
  