testcases:
  - name: "testcase 1"
    inputs:
    - 1 : [1,-2,3,4,-5,4,3,-2,1]
    output: 
    - 1 : [1,-2,3,4,-5,4,3,-2,1]
  - name: "testcase 2"
    inputs:
    - 1: [-1,-5,-3,-7,-8,-6,-2]
    output:
    - 1 : [-2,-6,-8,-7,-3,-5,-1]
  - name: "testcase 3"
    inputs:
    - 1: [-1, 2, -3, 4]
    output:
    - 1 : [4, -3, 2, -1]
  - name: "testcase 4"
    inputs:
    - 1: [1, -1, -2, 3, -4, 5]
    output:
    - 1 : [5, -4, 3, -2, -1, 1]
  - name: "testcase 5"
    inputs:
    - 1: [28, 21, 14, 7]
    output:
    - 1 : [7, 14, 21, 28]