testcases:
  - name: "testcase 1"
    inputs:
    - 1 : "babad"
    output:
    - 1 : "bab"

  - name: "testcase 2"
    inputs:
    - 1: "aabbccddccbbae"
    output:
    - 1: "aabbccddccbba"

  - name: "testcase 3"
    inputs:
    - 1: "madam"
    output:
    - 1: "madam"

  - name: "testcase 4"
    inputs:
    - 1 : "morning"
    output:
    - 1 : "nin"

  - name: "testcase 5"
    inputs:
    - 1: "book"
    output:
    - 1: "oo"