diff --git a/blocks.py b/blocks.py
index 9d788ff..eb66e5b 100644
--- a/blocks.py
+++ b/blocks.py
@@ -28,10 +28,6 @@ EMERALD_BLOCK = 5407
 TEST_BLOCK = (616, 78, 496)
 
 
-WATER = [
-    'water',
-]
-
 AVOID = [
     'lava',
     'water',
@@ -263,89 +259,37 @@ INDEXED = [
     'barrel',
 ] + BEDS
 
+def get_set(ids):
+    result = set()
+    for block_name in ids:
+        for state in JSON_BLOCKS['minecraft:' + block_name]['states']:
+            result.add(state['id'])
+    return result
 
-NON_SOLID_IDS = set([SINGLE_SNOW])
-for block_name in NON_SOLID:
-    for state in JSON_BLOCKS['minecraft:' + block_name]['states']:
-        NON_SOLID_IDS.add(state['id'])
-
-AVOID_IDS = set()
-for block_name in AVOID:
-    for state in JSON_BLOCKS['minecraft:' + block_name]['states']:
-        AVOID_IDS.add(state['id'])
-
-WATER_IDS = set()
-for block_name in WATER:
-    for state in JSON_BLOCKS['minecraft:' + block_name]['states']:
-        WATER_IDS.add(state['id'])
-
-LOG_IDS = set()
-for block_name in LOGS:
-    for state in JSON_BLOCKS['minecraft:' + block_name]['states']:
-        LOG_IDS.add(state['id'])
-
-LEAF_IDS = set()
-for block_name in LEAVES:
-    for state in JSON_BLOCKS['minecraft:' + block_name]['states']:
-        LEAF_IDS.add(state['id'])
-
-CHEST_IDS = set()
-for block_name in ['chest']:
-    for state in JSON_BLOCKS['minecraft:' + block_name]['states']:
-        CHEST_IDS.add(state['id'])
-
-BARREL_IDS = set()
-for block_name in ['barrel']:
-    for state in JSON_BLOCKS['minecraft:' + block_name]['states']:
-        BARREL_IDS.add(state['id'])
-
-TRAPPED_CHEST_IDS = set()
-for block_name in ['trapped_chest']:
-    for state in JSON_BLOCKS['minecraft:' + block_name]['states']:
-        TRAPPED_CHEST_IDS.add(state['id'])
-
-NETHERWART_IDS = set()
-for block_name in ['nether_wart']:
-    for state in JSON_BLOCKS['minecraft:' + block_name]['states']:
-        NETHERWART_IDS.add(state['id'])
-
-WHEAT_IDS = set()
-for block_name in ['wheat']:
-    for state in JSON_BLOCKS['minecraft:' + block_name]['states']:
-        WHEAT_IDS.add(state['id'])
-
-POTATO_IDS = set()
-for block_name in ['potatoes']:
-    for state in JSON_BLOCKS['minecraft:' + block_name]['states']:
-        POTATO_IDS.add(state['id'])
-
-CARROT_IDS = set()
-for block_name in ['carrots']:
-    for state in JSON_BLOCKS['minecraft:' + block_name]['states']:
-        CARROT_IDS.add(state['id'])
-
-BEETROOT_IDS = set()
-for block_name in ['beetroots']:
-    for state in JSON_BLOCKS['minecraft:' + block_name]['states']:
-        BEETROOT_IDS.add(state['id'])
-
-SAPLING_IDS = set()
-for block_name in SAPLINGS:
-    for state in JSON_BLOCKS['minecraft:' + block_name]['states']:
-        SAPLING_IDS.add(state['id'])
-
-BED_IDS = set()
-for block_name in BEDS:
-    for state in JSON_BLOCKS['minecraft:' + block_name]['states']:
-        BED_IDS.add(state['id'])
-
+NON_SOLID_IDS = get_set(NON_SOLID)
+NON_SOLID_IDS.add(SINGLE_SNOW)
 
+AVOID_IDS = get_set(AVOID)
+WATER_IDS = get_set(['water'])
+LOG_IDS = get_set(LOGS)
+LEAF_IDS = get_set(LEAVES)
+CHEST_IDS = get_set(['chest'])
+BARREL_IDS = get_set(['barrel'])
+TRAPPED_CHEST_IDS = get_set(['trapped_chest'])
+NETHERWART_IDS = get_set(['nether_wart'])
+WHEAT_IDS = get_set(['wheat'])
+POTATO_IDS = get_set(['potatoes'])
+CARROT_IDS = get_set(['carrots'])
+BEETROOT_IDS = get_set(['beetroots'])
+SAPLING_IDS = get_set(SAPLINGS)
+BED_IDS = get_set(BEDS)
 
 INDEXED_IDS = set()
 for block_name in INDEXED:
     for state in JSON_BLOCKS['minecraft:' + block_name]['states']:
         INDEXED_IDS.add(state['id'])
 
+
 MATURE_WHEAT_ID = max(WHEAT_IDS)
 MATURE_POTATO_ID = max(POTATO_IDS)
 MATURE_CARROT_ID = max(CARROT_IDS)
diff --git a/items.py b/items.py
index c03bd83..41da781 100644
--- a/items.py
+++ b/items.py
@@ -67,34 +67,25 @@ LOGS = [
     'dark_oak_log',
 ]
 
-BED_IDS = set()
-for item_name in BEDS:
-    BED_IDS.add(ITEMS['minecraft:'+item_name]['protocol_id'])
 
-SHOVEL_IDS = set()
-for item_name in SHOVELS:
-    SHOVEL_IDS.add(ITEMS['minecraft:'+item_name]['protocol_id'])
+def get_set(ids):
+    result = set()
+    for item_name in ids:
+        result.add(ITEMS['minecraft:'+item_name]['protocol_id'])
+    return result
 
-AXE_IDS = set()
-for item_name in AXES:
-    AXE_IDS.add(ITEMS['minecraft:'+item_name]['protocol_id'])
-
-FOOD_IDS = set()
-for item_name in FOOD:
-    FOOD_IDS.add(ITEMS['minecraft:'+item_name]['protocol_id'])
-
-SAPLING_IDS = set()
-for item_name in SAPLINGS:
-    SAPLING_IDS.add(ITEMS['minecraft:'+item_name]['protocol_id'])
-
-LOG_IDS = set()
-for item_name in LOGS:
-    LOG_IDS.add(ITEMS['minecraft:'+item_name]['protocol_id'])
+BED_IDS = get_set(BEDS)
+SHOVEL_IDS = get_set(SHOVELS)
+AXE_IDS = get_set(AXES)
+FOOD_IDS = get_set(FOOD)
+SAPLING_IDS = get_set(SAPLINGS)
+LOG_IDS = get_set(LOGS)
 
 ITEM_NAMES = {}
 for item_name, item in ITEMS.items():
     ITEM_NAMES[ITEMS[item_name]['protocol_id']] = item_name.replace('minecraft:', '')
 
+
 def get_id(name):
     return ITEMS['minecraft:' + name]['protocol_id']
 
@@ -115,7 +106,9 @@ BERRIES_ID = get_id('sweet_berries')
 IRON_INGOT_ID = get_id('iron_ingot')
 
 
-INIT_NEEDED_ITEMS = BED_IDS | FOOD_IDS | set([CHEST_ID])
+INIT_NEEDED_ITEMS = BED_IDS | FOOD_IDS
+INIT_NEEDED_ITEMS.add(CHEST_ID)
+
 NEEDED_ITEMS = INIT_NEEDED_ITEMS
 
 INIT_WANTED_ITEMS = set()