testcases:
  - name: "testcase 1"
    inputs:
    - 1 : [[1]]
    output: 
    - 1 : [1]
  - name: "testcase 2"
    inputs:
    - 1: [[6], [2]]
    output:
    - 1 : [6, 2]
  - name: "testcase 3"
    inputs:
    - 1: [[2, 14, 8], [12, 7, 14]]
    output:
    - 1 : [2, 14, 8, 14, 7, 12]
  - name: "testcase 4"
    inputs:
    - 1: [[3, 1, 1], [15, 12, 13], [4, 14, 12], [10, 5, 11]]
    output:
    - 1 : [3, 1, 1, 13, 12, 11, 5, 10, 4, 15, 12, 14]
  - name: "testcase 5"
    inputs:
    - 1: [[10, 1, 14, 11, 14], [13, 4, 8, 2, 13], [10, 19, 1, 6, 8], [20, 10, 8, 2, 12], [15, 6, 8, 8, 18]]
    output:
    - 1 : [10, 1, 14, 11, 14, 13, 8, 12, 18, 8, 8, 6, 15, 20, 10, 13, 4, 8, 2, 6, 2, 8, 10, 19, 1]