Ordonner 2 listes aléatoires d'entier dans une seule liste.
Implement sort_and_merge(nums1, nums2). The inputs are two lists of integers, and the output must be one list sorted in nondecreasing order, preserving duplicate values. The input lists must not be modified.
Input shape: two integer lists. Return the combined sorted list.
def sort_and_merge(nums1, nums2):