How to combine shards?

[shubhanshu02]

I am trying to reproduce the results and experiment with your approach using the code from this repository. In the Pre-processed data from Drive section of README.md, it is instructed to download all the shards from the iCloud and then use the cat command to

cat command to reform the original file before extracting

I tried the cat data_repri00 command, but it only shows the first shard's content, which is the expected output from cat command.

Can you please tell how to reform the original file correctly?