human
How to add a specific number of characters to the end of string in Pandas?
assistant
Here is some code to initialize a pandas series object `s` with columns `['A', 'B', 'A1R', 'B2', 'AABB4']`

s = pd.Series(['A', 'B', 'A1R', 'B2', 'AABB4'])

#Warning: this code generation is experimental. Please inspect the code for any bugs before executing.