data = """\
3 4
4 3
2 5
1 3
3 9
3 3
"""
# data = open("2024/day01/data.txt").read()
list1 = []
list2 = []
for line in data.splitlines():
l1, l2 = line.split(" ")
list1.append(int(l1))
list2.append(int(l2))
list1.sort()
list2.sort()
sim_score = 0
for l1 in list1:
sim_score += l1 * list2.count(l1)
return_value = sim_score
print(return_value)