Write the letter after the last letter in the row with a specific character

I'm a beginner trying to use Python.

You are about to modify the txt file with Python.

For example,

.... Previous row

2019 Statistics (Statistics Office) 25

—- Subsequent rows

If it says so,

2019 -> \par \hfill{\scriptsize 2019 Change to

25 -> 25 }

Here, 25 is the last letter of the line. What should I do with the program I change to?

And not only in 2019, but from 1980 to 2019 That is,

1990 Statistics ... .. 1991 Statistics ... ..

How do I deal with the lights collectively?

python

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