1def merge(items1, items2): 2 items3 = [] 3 index1, index2 = 0, 0 4 while index1 < len(items) and index2 < len(items2): 5 if items[index1] < items2[index2]: 6 items3.append(items1[index1]) 7 index1 += 1 8 else: 9 items3.append(items2[index2]) 10 index2 += 1 11 12