a.txt has about 100k words, each words is in new line
july.cpp windows.exe ttm.rar document.zip
b.txt has 150k words, one word by line - some words are from file
a.txt, but some words are new:
july.cpp NOVEMBER.txt windows.exe ttm.rar document.zip diary.txt
How can I merge this files into one, delete all duplicate lines, and keep lines that are new (lines that exist in
a.txt but don't exist in
b.txt, and vice versa)?