TutorQ1

target = int(input())
# Pull the list from input, split by ", " character, and convert to integers
pair_list = list(map(int, input().split(", ")))

# Create a set (all unique elements from the list)
pair_set = set(pair_list)

results = []

for item1 in pair_set:
  for item2 in pair_set:
    # Only one of each pair, so force them ascending
    if item1 <= item2:
      # If they meet the criteria
      if item1+item2 = target:
        if item1 != item2:
          results.append((item1, item2))
        else:
          # Make sure that we have more than one element to make a pair
          if pair_list.count(item1) > 1:
            results.append((item1, item2))