testcases:
  - name: "testcase 1"
    inputs:
    - 1 : [[0]]
    output: 
    - 1 : [[0]]
  - name: "testcase 2"
    inputs:
    - 1: [[0,1],[1,1]]
    output:
    - 1 : [[0, 1], [1, 2]]
  - name: "testcase 3"
    inputs:
    - 1: [[0,0,1],[0,1,1],[1,0,1]]
    output:
    - 1 : [[0, 0, 1], [0, 1, 2], [1, 0, 1]]
  - name: "testcase 4"
    inputs:
    - 1: [[0,1,0,1], [1,0,1,0],[0,1,0,1],[1,0,1,0]]
    output:
    - 1 : [[0,1,0,1], [1,0,1,0],[0,1,0,1],[1,0,1,0]]
  - name: "testcase 5"
    inputs:
    - 1: [[0,1,0,1], [1,1,1,0],[0,1,1,1],[1,0,1,1]]
    output:
    - 1 : [[0, 1, 0, 1], [1, 2, 1, 0], [0, 1, 2, 1], [1, 0, 1, 2]]