testcases:
  - name: "testcase 1"
    inputs:
    - 1 : [[1, 2], [1, 3], [2, 3]]
    output: 
    - 1 : [2,3]
  - name: "testcase 2"
    inputs:
    - 1: [[1, 2], [2, 3], [1, 3]]
    output:
    - 1 : [1,3]
  - name: "testcase 3"
    inputs:
    - 1 : [[1, 2], [2, 3], [3, 4], [1, 4], [1, 5]]
    output: 
    - 1 : [1,4]
  - name: "testcase 4"
    inputs:
    - 1: [[1, 2], [1, 3], [1, 4], [2, 3]]
    output:
    - 1 : [2,3]
  - name: "testcase 5"
    inputs:
    - 1: [[1, 2] , [1, 3], [1, 4], [1,5], [2, 5]]
    output:
    - 1 : [2, 5]