diff --git a/code_study/Baekjoon/python/9019.py b/code_study/Baekjoon/python/9019.py
new file mode 100644
index 0000000..870ff0d
--- /dev/null
+++ b/code_study/Baekjoon/python/9019.py
@@ -0,0 +1,42 @@
+import sys
+from collections import deque
+
+input = sys.stdin.readline
+
+def convert_4length(s) :
+    return "000" + s if len(s) == 1 else "00" + s if len(s) == 2 else "0" + s if len(s) == 3 else s
+
+def DSLR(order,numString) :
+    if order == 'D' :
+        return convert_4length(str(int(numString)*2 % 10000))    
+    elif order == 'S' :
+        return convert_4length(str(int(numString) - 1 if int(numString) > 0 else 9999))
+    elif order == 'L' :
+        return numString[1] + numString[2] + numString[3] + numString[0]
+    elif order == 'R' :
+        return numString[3] + numString[0] + numString[1] + numString[2]
+
+def BFS(a, b) :
+    a = convert_4length(a)
+    b = convert_4length(b)
+    visited = [False for _ in range(10000)]
+    q = deque()
+    q.append((a, ""))
+    
+    while len(q) :
+        currentValue, currentOrderStream = q.popleft()
+        
+        for o in "DSLR" :
+            nextValue = DSLR(o,currentValue)
+            nextOrderStream = currentOrderStream + o
+            
+            if nextValue == b :
+                return nextOrderStream
+            
+            if not visited[int(nextValue)] :
+                visited[int(nextValue)] = True
+                q.append((nextValue, nextOrderStream))
+
+for _ in range(int(input())) :
+    A, B = input().split()
+    print(BFS(A, B))
\ No newline at end of file