diff --git a/2020/17/17.py b/2020/17/17.py
index 5367d77..344d97c 100644
--- a/2020/17/17.py
+++ b/2020/17/17.py
@@ -12,9 +12,9 @@ def main(d):
 	neighboring = [()] # list contains empty tuple which will be iterated over
 	for _ in range(d):
 		neighboring = [
-			t + (x,)
-			for x in [-1, 0, 1]
-			for t in neighboring
+			_tuple + (offset,)
+			for offset in [-1, 0, 1]
+			for _tuple in neighboring
 		]
 	neighboring.remove(d * (0,)) # this is the center cell
 
@@ -22,13 +22,13 @@ def main(d):
 	from collections import Counter
 	for _ in range(6):
 		active = set(
-			t
-			for t, count in Counter( # unpack the tuple and its count of neighboring active cells
-				tuple(map(sum, zip(t, n))) # add neighbors kernel to each active cell
-				for t in active
-				for n in neighboring
+			_tuple
+			for _tuple, count in Counter( # unpack the tuple and its count of neighboring active cells
+				tuple(map(sum, zip(_tuple, offset))) # add neighbors kernel to each active cell
+				for _tuple in active
+				for offset in neighboring
 			).items()
-			if count == 3 or t in active and count == 2
+			if count == 3 or _tuple in active and count == 2
 		)
 
 	return len(active)