zip

len_s = IN[0]
h_s = IN[1]
out_list1, out_list2 = [], []
for len, h_s in zip(len_s, h_s):
        out_list1.append(len)
        out_list1.append(h_s)
        out_list2.append(out_list1)
        out_list1 = []
OUT = out_list2