from helper import load_lists

list_1, list_2 = load_lists()

id_counts = {}
for id in list_2:
    if id not in id_counts:
        id_counts[id] = 1
    else:
        id_counts[id] += 1

result = 0
for id in list_1:
    if id in id_counts:
        result += (id * id_counts[id])

print(result)