diff --git a/api/advent22_api/routers/_misc.py b/api/advent22_api/routers/_misc.py
index 3b402e8..3947a13 100644
--- a/api/advent22_api/routers/_misc.py
+++ b/api/advent22_api/routers/_misc.py
@@ -1,6 +1,6 @@
 import itertools
 import random
-from typing import Sequence
+from typing import Any, Sequence
 
 from ..dav_common import dav_get_file
 
@@ -10,6 +10,10 @@ async def get_loesungswort() -> str:
     return fp.read().decode("utf8").strip()
 
 
+async def get_rnd(bonus_salt: Any = "") -> random.Random:
+    loesungswort = await get_loesungswort()
+    return random.Random(f"{loesungswort}{bonus_salt}")
+
 
 async def set_length(seq: Sequence, length: int) -> list:
     # `seq` unendlich wiederholen
@@ -18,9 +22,10 @@ async def set_length(seq: Sequence, length: int) -> list:
     return list(itertools.islice(infinite, length))
 
 
-async def shuffle(seq: Sequence) -> list:
+async def shuffle(seq: Sequence, rnd: random.Random | None = None) -> list:
     # Zufallsgenerator
-    rnd = random.Random(await get_loesungswort())
+    if rnd is None:
+        rnd = await get_rnd()
 
     # Elemente mischen
     return rnd.sample(seq, len(seq))
diff --git a/api/advent22_api/routers/days.py b/api/advent22_api/routers/days.py
index b48c9c8..3d5c838 100644
--- a/api/advent22_api/routers/days.py
+++ b/api/advent22_api/routers/days.py
@@ -1,5 +1,4 @@
 import colorsys
-import random
 import re
 # from datetime import date
 from io import BytesIO
@@ -10,15 +9,14 @@ from PIL import ImageDraw, ImageFont
 
 from ..dav_common import dav_get_file, dav_list_files
 from ._image import AdventImage
-from ._misc import set_length, shuffle
+from ._misc import get_loesungswort, get_rnd, set_length, shuffle
 
 router = APIRouter(prefix="/days", tags=["days"])
 
-loesungswort = "ABCDEFGHIJKLMNOPQRSTUVWX"
-
 
 @router.on_event("startup")
 async def startup() -> None:
+    loesungswort = await get_loesungswort()
     print(loesungswort)
     print("".join(await shuffle(loesungswort)))
 
@@ -26,6 +24,7 @@ async def startup() -> None:
 @router.get("/letter/{index}")
 async def get_letter(
     index: int,
+    loesungswort: str = Depends(get_loesungswort),
 ) -> str:
     return (await shuffle(loesungswort))[index]
 
@@ -99,7 +98,7 @@ async def get_picture_for_day(
     font = ImageFont.truetype("Lena.ttf", 50)
 
     # Position des Buchstaben bestimmen
-    rnd = random.Random(f"{loesungswort}{index}")
+    rnd = await get_rnd(index)
     xy = tuple(rnd.choices(range(30, 470), k=2))
 
     # betroffenen Bildbereich bestimmen