diff --git a/code_study/Baekjoon/python/3449.py b/code_study/Baekjoon/python/3449.py
new file mode 100644
index 0000000..b4e6866
--- /dev/null
+++ b/code_study/Baekjoon/python/3449.py
@@ -0,0 +1,12 @@
+import sys
+input = sys.stdin.readline
+
+ans = []
+for _ in range(int(input())) :
+    dist = 0 
+    for a, b in zip(input().rstrip(), input().rstrip()) :
+        dist += (abs(int(a) - int(b)))
+    ans.append(dist)
+
+for i in ans :
+    print(f'Hamming distance is {i}.')