1 files changed, 37 insertions, 0 deletions
diff --git a/challenge-328/sgreen/python/ch-1.py b/challenge-328/sgreen/python/ch-1.py
new file mode 100755
index 0000000000..16e539b9b1
--- /dev/null
+++ b/challenge-328/sgreen/python/ch-1.py
@@ -0,0 +1,37 @@
+#!/usr/bin/env python3
+
+import sys
+
+
+def replace_all_questions(input_string: str) -> str:
+    solution = ''
+    for idx, char in enumerate(input_string):
+        if char != '?':
+            solution += char
+            continue
+
+        # Get the surrounding characters
+        letters = []
+        if idx > 0:
+            letters.append(input_string[idx - 1])
+        if idx < len(input_string) - 1:
+            letters.append(input_string[idx + 1])
+
+        # Replace '?' with 'a', 'b', or 'c' based on surrounding characters
+        if 'a' not in letters:
+            solution += 'a'
+        elif 'b' not in letters:
+            solution += 'b'
+        else:
+            solution += 'c'
+
+    return solution
+
+
+def main():
+    result = replace_all_questions(sys.argv[1])
+    print('"' + result + '"')
+
+
+if __name__ == '__main__':
+    main()