diff --git a/10/j.py b/10/j.py
index aadb0cd..28f441d 100644
--- a/10/j.py
+++ b/10/j.py
@@ -1,4 +1,5 @@
 import os
+import sys
 
 input = open(os.path.dirname(__file__) +
              "/input.txt", "r").readlines()
@@ -11,12 +12,7 @@ cost = {
 H = 6
 W = 40
 
-screen = []
-for y in range(H):
-    tmp = ''
-    for x in range(W):
-        tmp += '.'
-    screen.append(tmp)
+screen = [[False for i in range(W)] for j in range(H)]
 
 cycle = 1
 X = 1
@@ -38,9 +34,7 @@ for l in input:
             line += 1
 
         if (pos == X-1 or pos == X or pos == X+1):
-
-            cur = screen[line-1]
-            screen[line-1] = cur[:pos] + "#" + cur[pos+1:]
+            screen[line-1][pos] = True
 
         cycle += 1
 
@@ -52,7 +46,10 @@ print(sum(strs))
 
 # p2
 for y in range(H):
-    tmp = ''
+
     for x in range(W):
-        tmp += screen[y][x]
-    print(tmp)
+        if (screen[y][x]):
+            print("#", end="")
+        else:
+            print(".", end="")
+    print()
diff --git a/10/out.txt b/10/out.txt
deleted file mode 100644
index 7a6ed20..0000000
--- a/10/out.txt
+++ /dev/null
@@ -1,361 +0,0 @@
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