#### OUTPUT
1
  Enter comma seperated integers
  1,2,3,4,6,7,8
  Enter pair sum
  10
  ((2, 8), (3, 7), (4, 6), (6, 4), (7, 3), (8, 2))

2
  Enter comma seperated integers
  1,2,3,4,6,7,8
  Enter pair sum
  5
  ((1, 4), (2, 3), (3, 2), (4, 1))

3
  Enter comma seperated integers
  1,2,3,4,6,7,8
  Enter pair sum
  20
  (No pairs)

4
  Enter comma seperated integers
  1,2,3,4,6,7,p
  Invalid Input (Only Integers allowed)