diff --git a/interview-process/engineers/questions/parenthesis.md b/interview-process/engineers/questions/parenthesis.md
index b9e8252..53483eb 100644
--- a/interview-process/engineers/questions/parenthesis.md
+++ b/interview-process/engineers/questions/parenthesis.md
@@ -13,13 +13,45 @@ Write a method that for a given input string, reverse all the characters inside
 ```
 
 ## Observations
-- How to solve it? Using a stack and a queue.
+- How to solve it? Two possible solutions for this problem are using recursion or using a stack.
+
+## Possible Solutions
+```python
+def reverse_text_inside_parens(text):
+    pending_outputs = []
+    output_so_far = ''
+
+    for i in range(len(text)):
+        if text[i] == '(':
+            pending_outputs.append(output_so_far)
+            output_so_far = ''
+
+        elif text[i] == ')':
+            if len(pending_outputs) == 0:
+                raise ValueError('Malformed expression')
+
+            previous_output = pending_outputs.pop()
+            output_so_far = previous_output + output_so_far[::-1]
+        else:
+            output_so_far += text[i]
+
+    if len(pending_outputs) > 0:
+        raise ValueError('Malformed expression')
+
+    return output_so_far
+```
 
 ## Test cases
 ```javascript
-foobarbaz => foobarbaz
-foo(bar)baz => foorabbaz
-foo(bar(baz))blim => foo(barzab)blim => foobazrabblim
+'' => ''
+'()' => ''
+'(())(((())))' => ''
+'(bar)' => 'rab'
+'((bar))' => 'bar'
+'wi(ez)(((il)))(en)' => 'wizeline'
+'foobarbaz' => 'foobarbaz'
+'foo(bar)baz' => 'foorabbaz'
+'foo(bar(baz))blim' => 'foo(barzab)blim' => 'foobazrabblim'
 ```
 
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