```
$ yml2cli -i a.yml b.yml
 -a1 -b"1" "2" -c3 -d4
miriyalak@krishna-dev:~/yml2cli/test$ cat a.yml b.yml
---
a: 1
b:
    - 3
    - 4
c: 6
---
b:
    - 1
    - 2
c: 3
d: 4
```