See here : [https://berryberry.hatenablog.jp/](https://berryberry.hatenablog.jp/entry/2022/03/07/230635)

## Solution
We can get "icandothisallday.zip" first and unzip it. You can see lots of files in your current directory. Like this.

We can guess that the flag is in those files. Therefore, we type this and run it.
```
## written in python

from glob import glob

directory = "<your current directory absolute path>" ## like "/home/ubuntu/Downloads/eCTF/amam"
for file in glob(directory + '/*.txt'):
data = open(file, "r").read()
if ("CTF" in data):
print(data)
```
Now, we can get this flag.
```
CTF{d3cry47ing_nu3l34r_c0d35}
```