Hi, can I get all the keys that appear only once, I mean get them from two files?

[omrv]

Hi, itis possible to I get all the keys that appear only once, I mean get them from two files,
For example:

file1.yml:
cont:
city:
street:15
family:10
number:13
id:11

addr:22
sttr:24
abbr:

file2.yml:
cont:
city:
street:15
family:10

addr:22
sttr:24
abbr:25

The result should be received output:

cont:
city:
abbr:25
id:11
number:13

Thanks