testcases:
  - name: "testcase 1"
    inputs:
    - 1 : "2"
    output: 
    - 1 : ['a', 'b', 'c']
  - name: "testcase 2"
    inputs:
    - 1: "73"
    output:
    - 1 : ["pd","pe","pf","qd","qe","qf","rd","re","rf","sd","se","sf"]
  - name: "testcase 3"
    inputs:
    - 1: "426"
    output:
    - 1 : ["gam","gan","gao","gbm","gbn","gbo","gcm","gcn","gco","ham","han","hao","hbm","hbn","hbo","hcm","hcn","hco","iam","ian","iao","ibm","ibn","ibo","icm","icn","ico"]
  - name: "testcase 4"
    inputs:
    - 1: "78"
    output:
    - 1 : ["pt","pu","pv","qt","qu","qv","rt","ru","rv","st","su","sv"]
  - name: "testcase 5"
    inputs:
    - 1: "925"
    output:
    - 1 : ["waj","wak","wal","wbj","wbk","wbl","wcj","wck","wcl","xaj","xak","xal","xbj","xbk","xbl","xcj","xck","xcl","yaj","yak","yal","ybj","ybk","ybl","ycj","yck","ycl","zaj","zak","zal","zbj","zbk","zbl","zcj","zck","zcl"]