diff --git a/day1_2_refactor.py b/day1_2_refactor.py
new file mode 100755
index 0000000..0b4045f
--- /dev/null
+++ b/day1_2_refactor.py
@@ -0,0 +1,21 @@
+#!/usr/bin/env python3
+import sys, utils
+
+def find_increasing_window(l: list):
+    win = l[:3]  
+    count = 0
+    for n in range(4, len(l)+1):
+        new_win = l[n-3:n]
+        if sum(new_win) > sum(win):
+            count += 1
+        win = new_win
+    return count
+
+if __name__ == '__main__':
+    if len(sys.argv) < 2:
+        print("please supply input file")
+        sys.exit()
+    f = utils.File(sys.argv[1])
+    print(find_increasing_window(f.get_ints()))
+
+
diff --git a/day3_1.py b/day3_1.py
index 122ec08..3a648e9 100755
--- a/day3_1.py
+++ b/day3_1.py
@@ -8,7 +8,6 @@ def power_consumption(l: list):
 def calculate_common(l: list):
     counter = [0 for _ in range(len(l[0]))]
     for line in l:
-        line = line.rstrip('\n')
         for i in range(len(line)):
             if line[i] == '1':
                 counter[i] += 1
diff --git a/day5_2.py b/day5_2.py
index 48e84a0..3df72f8 100755
--- a/day5_2.py
+++ b/day5_2.py
@@ -89,7 +89,7 @@ if __name__ == '__main__':
     m = Map(x, y)
     for x1, y1, x2, y2 in coords:
         m.add_line(x1, y1, x2, y2)
-    # print(m)
+    print(m)
     print(m.calculate_points(2))
 
 
diff --git a/utils.py b/utils.py
index 8f64dfb..ef93da2 100644
--- a/utils.py
+++ b/utils.py
@@ -32,3 +32,6 @@ class File(object):
         self.lines = []
         self.filename = ''
 
+    def len(self):
+        return len(self.lines)
+