
Assuming delims is required, the following result was found.
InitializingFile_456.csv -- the following loops through directory and separates by underscores FOR /F "tokens=2,3* delims=_" %%A IN ('DIR InitializingFile*') DO ECHO %%A -- yields: 123.csv 456.csv So that's our first loop, here's what the second loop...

bc1qf6elrdxc968h0k673l2djc9wrpazhqtxw8qqp4
0xb038962F3809b425D661EF5D22294Cf45E02FebF