testcases:
  - name: "testcase 1"
    inputs:
    - 1 : [[6, 9], [2, 7]]
    output: 
    - 1 : [[2, 6], [7, 9]]
  - name: "testcase 2"
    inputs:
    - 1: [[1]]
    output:
    - 1 : [[1]]
  - name: "testcase 3"
    inputs:
    - 1: [[2, 14, 8], [12, 7, 14], [3, 3, 7]]
    output:
    - 1 : [[3, 12, 2], [3, 7, 14], [7, 14, 8]]
  - name: "testcase 4"
    inputs:
    - 1: [[3, 1, 1, 7], [15, 12, 13, 13], [4, 14, 12, 4], [10, 5, 11, 12]]
    output:
    - 1 : [[10, 4, 15, 3], [5, 14, 12, 1], [11, 12, 13, 1], [12, 4, 13, 7]]
  - 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 : [[15, 20, 10, 13, 10], [6, 10, 19, 4, 1], [8, 8, 1, 8, 14], [8, 2, 6, 2, 11], [18, 12, 8, 13, 14]]
  - name: "testcase 6"
    inputs:
    - 1: [[19, 12, 1, 13, 14, 4], [1, 2, 16, 2, 2, 5], [11, 20, 13, 17, 20, 7], [6, 15, 11, 10, 4, 4], [1, 18, 6, 16, 3, 19], [16, 6, 18, 12, 9, 2]]
    output:
    - 1 : [[16, 1, 6, 11, 1, 19], [6, 18, 15, 20, 2, 12], [18, 6, 11, 13, 16, 1], [12, 16, 10, 17, 2, 13], [9, 3, 4, 20, 2, 14], [2, 19, 4,  7,  5, 4]]
  - name: "testcase 7"
    inputs:
    - 1: [[17, 17, 18,  9, 15, 15, 19], [7, 9, 2, 19, 5, 11, 8], [14, 10, 6, 12, 13, 8, 1], [5, 19, 2, 14, 12,  8, 20], [13, 18, 13, 9, 9, 16, 13], [20, 1, 6, 2, 2, 11, 5], [17, 16, 4, 11, 18, 2, 2]]
    output:
    - 1 : [[17, 20, 13,  5, 14,  7, 17], [16, 1, 18, 19, 10,  9, 17], [4, 6, 13, 2, 6, 2, 18], [11, 2, 9, 14, 12, 19, 9], [18, 2, 9, 12, 13, 5, 15], [2, 11, 16, 8, 8, 11, 15], [2, 5, 13, 20, 1, 8, 19]]