testcases:
  - name: "testcase 1"
    inputs:
    - 1 : [[[1, 2], [5, 6]], [[1, 3]], [[4, 10]]]
    output: 
    - 1 : [[3,4]]
  - name: "testcase 2"
    inputs:
    - 1 : [[[1, 3], [6, 7]], [[2, 4]], [[2, 5], [9, 12]]]
    output: 
    - 1 : [[5,6],[7,9]]
  - name: "testcase 3"
    inputs:
    - 1 : [[[2, 3], [7, 9]], [[1, 4], [6, 7]]]
    output: 
    - 1 : [[4,6]]
  - name: "testcase 4"
    inputs:
    - 1 : [[[3, 5], [8, 10]], [[4, 6], [9, 12]], [[5, 6], [8, 10]]]
    output: 
    - 1 : [[6,8]]
  - name: "testcase 5"
    inputs:
    - 1 : [[[1, 2], [3, 4], [5, 6], [7, 8], [9, 10], [11, 12]], [[1, 2], [3, 4], [5, 6], [7, 8], [9, 10], [11, 12]], [[1, 2], [3, 4], [5, 6], [7, 8], [9, 10], [11, 12]], [[1, 2], [3, 4], [5, 6], [7, 8], [9, 10], [11, 12]]]
    output: 
    - 1 : [[2, 3], [4, 5], [6, 7], [8, 9], [10, 11]]
  - name: "testcase 6"
    inputs:
    - 1 : [[[1, 3], [6, 9], [10, 11]], [[3, 4], [7, 12]], [[1, 3], [7, 10]], [[1, 4]], [[7, 10], [11, 12]]]
    output: 
    - 1 : [[4,6]]
  - name: "testcase 7"
    inputs:
    - 1 : [[[1, 2], [3, 4], [5, 6], [7, 8]], [[2, 3], [4, 5], [6, 8]]]
    output: 
    - 1 : []
  - name: "testcase 8"
    inputs:
    - 1 : [[[1,2],[3,4]], [[2,3]], [[4,6]]]
    output: 
    - 1 : []
  - name: "testcase 9"
    inputs:
    - 1 : [[[1, 3], [5, 6], [9, 10]],[[2, 4], [7, 8]],[[8, 11], [12, 14]]]
    output: 
    - 1 : [[4,5],[6,7],[11,12]]