testcases:
  - name: "testcase 1"
    inputs:
    - 1 : [1, 2, 3, null, null, 4, 5]
    output: 
    - 1 : [1, 3, 5]
  - name: "testcase 2"
    inputs:
    - 1 : [1, 2, null, 3, null, 4]
    output: 
    - 1 : [1, 2, 3, 4]
  - name: "testcase 3"
    inputs:
    - 1 : [1, 2, 3, 4, 5, 6, 7, 8]
    output: 
    - 1 : [1, 3, 7, 8]
  - name: "testcase 4"
    inputs:
    - 1 : [1, 2, 3, 4, 5, 6, null, 8]
    output: 
    - 1 : [1, 3, 6, 8]
  - name: "testcase 5"
    inputs:
    - 1 : []
    output: 
    - 1 : []
  - name: "testcase 6"
    inputs:
    - 1 : [1, 2, null, 3, 4]
    output: 
    - 1 : [1, 2, 4]