diff --git a/challenges/2020-fall.py b/challenges/2020-fall.py
index 38852c3..fd8228c 100644
--- a/challenges/2020-fall.py
+++ b/challenges/2020-fall.py
@@ -1,44 +1,61 @@
 import sys
 import math
 
-# Auto-generated code below aims at helping you parse
-# the standard input according to the problem statement.
+
+def debug(*args, **kwargs):
+    print(*args, file=sys.stderr, flush=True, **kwargs)
 
 
-# game loop
-while True:
-    action_count = int(input())  # the number of spells and recipes in play
-    for i in range(action_count):
-        # action_id: the unique ID of this spell or recipe
-        # action_type: in the first league: BREW; later: CAST, OPPONENT_CAST, LEARN, BREW
-        # delta_0: tier-0 ingredient change
-        # delta_1: tier-1 ingredient change
-        # delta_2: tier-2 ingredient change
-        # delta_3: tier-3 ingredient change
-        # price: the price in rupees if this is a potion
-        # tome_index: in the first two leagues: always 0; later: the index in the tome if this is a tome spell, equal to the read-ahead tax
-        # tax_count: in the first two leagues: always 0; later: the amount of taxed tier-0 ingredients you gain from learning this spell
-        # castable: in the first league: always 0; later: 1 if this is a castable player spell
-        # repeatable: for the first two leagues: always 0; later: 1 if this is a repeatable player spell
-        action_id, action_type, delta_0, delta_1, delta_2, delta_3, price, tome_index, tax_count, castable, repeatable = input().split()
-        action_id = int(action_id)
-        delta_0 = int(delta_0)
-        delta_1 = int(delta_1)
-        delta_2 = int(delta_2)
-        delta_3 = int(delta_3)
-        price = int(price)
-        tome_index = int(tome_index)
-        tax_count = int(tax_count)
-        castable = castable != "0"
-        repeatable = repeatable != "0"
-    for i in range(2):
-        # inv_0: tier-0 ingredients in inventory
-        # score: amount of rupees
+def is_doable(inventory, recipe_delta):
+    for inv, rec in zip(inventory, recipe_delta):
+        if inv + rec < 0:
+            return False
+    return True
+
+
+def main():
+    # game loop
+    while True:
+        action_count = int(input())  # the number of spells and recipes in play
+        recipes = []
+        for i in range(action_count):
+            # action_id: the unique ID of this spell or recipe
+            # action_type: in the first league: BREW; later: CAST, OPPONENT_CAST, LEARN, BREW
+            # delta_0: tier-0 ingredient change
+            # delta_1: tier-1 ingredient change
+            # delta_2: tier-2 ingredient change
+            # delta_3: tier-3 ingredient change
+            # price: the price in rupees if this is a potion
+            # tome_index: in the first two leagues: always 0; later: the index in the tome if this is a tome spell, equal to the read-ahead tax
+            # tax_count: in the first two leagues: always 0; later: the amount of taxed tier-0 ingredients you gain from learning this spell
+            # castable: in the first league: always 0; later: 1 if this is a castable player spell
+            # repeatable: for the first two leagues: always 0; later: 1 if this is a repeatable player spell
+            action_id, action_type, delta_0, delta_1, delta_2, delta_3, price, tome_index, tax_count, castable, repeatable = input().split()
+            action_id = int(action_id)
+            delta = [int(delta_0), int(delta_1), int(delta_2), int(delta_3)]
+            price = int(price)
+            recipes.append({"price": price, "delta": delta, "action_id": action_id, "action_type": action_type})
+            tome_index = int(tome_index)
+            tax_count = int(tax_count)
+            castable = castable != "0"
+            repeatable = repeatable != "0"
+
+        recipes.sort(reverse=True, key=lambda x: x["price"])
+
         inv_0, inv_1, inv_2, inv_3, score = [int(j) for j in input().split()]
+        my_inventory = [inv_0, inv_1, inv_2, inv_3]
+        my_score = score
+        inv_0, inv_1, inv_2, inv_3, score = [int(j) for j in input().split()]
+        enemy_inventory = [inv_0, inv_1, inv_2, inv_3]
+        enemy_score = score
 
-    # Write an action using print
-    # To debug: print("Debug messages...", file=sys.stderr, flush=True)
+        debug(f"{my_inventory}, {recipes}")
+        for recipe in recipes:
+            if is_doable(my_inventory, recipe["delta"]):
+                print(f"BREW {recipe['action_id']}")
+                continue
+        print("WAIT")
 
 
-    # in the first league: BREW <id> | WAIT; later: BREW <id> | CAST <id> [<times>] | LEARN <id> | REST | WAIT
-    print("BREW 0")
+if __name__ == "__main__":
+    main()