File objects - readlines() [SOLVED]

Question

I am confused about size arguements of readlines.
So these are contents of my txt file:-
123
456
789
098
xyz
When I used 4 as arguement , it included the 2nd line in list. But when I used 7 as arguement it didn't include 3rd line , 8 did. Then I used 11 as arguement as it should've included 4th line(8+3=11) , but it didn't , 12 did. And this patterns goes on and on...
Am I missing something or there's something wrong with my IDE(I tried both IDLE and PyCharm)?

Answer 1

One line contains 4 Bytes of data (three characters and one linefeed /n). So readlines() with arguments 4,8,12 will read the following line.

Answer 2

Michael Thanks buddy!