nums = list(map(int, input().split()))
target = int(input())
res = []
n = len(nums)
for i in range(n):
for j in range(i + 1, n):
if nums[i] + nums[j] == target:
res.append((nums[i], nums[j]))
res.sort(key=lambda x: x[0])
print(res)
bnVtcyA9IGxpc3QobWFwKGludCwgaW5wdXQoKS5zcGxpdCgpKSkKdGFyZ2V0ID0gaW50KGlucHV0KCkpCnJlcyA9IFtdCm4gPSBsZW4obnVtcykKZm9yIGkgaW4gcmFuZ2Uobik6CiAgICBmb3IgaiBpbiByYW5nZShpICsgMSwgbik6CiAgICAgICAgaWYgbnVtc1tpXSArIG51bXNbal0gPT0gdGFyZ2V0OgogICAgICAgICAgICByZXMuYXBwZW5kKChudW1zW2ldLCBudW1zW2pdKSkKcmVzLnNvcnQoa2V5PWxhbWJkYSB4OiB4WzBdKQoKcHJpbnQocmVzKQ==