diff --git a/delete-cols-sorted.py b/delete-cols-sorted.py
new file mode 100644
index 0000000..726507f
--- /dev/null
+++ b/delete-cols-sorted.py
@@ -0,0 +1,19 @@
+class Solution(object):
+    def minDeletionSize(self, strs):
+        """
+        :type strs: List[str]
+        :rtype: int
+        """
+        count = 0
+        removal = []
+        x = list(range(len(strs[0])))
+        for row_num in range(len(strs)):
+            for col_num in x:
+                if row_num > 0:
+                    if strs[row_num][col_num] < strs[row_num-1][col_num]:
+                        removal.append(col_num)
+                        count += 1
+            x = [elem for elem in x if elem not in removal]
+            #removal = []
+            #print(removal)
+        return count