restructure zeta/** to storage/zeta/**

storage/zeta/py/completed/4949.py

@@ -0,0 +1,27 @@
+I = input()
+stack = []
+while I != ".":
+    stack = []
+    for i in I:
+        if i in "()[]":
+            if i == ")" and stack:
+                if not stack:
+                    stack.append(0)
+                    break
+                elif stack[-1] == "(":
+                    stack.pop()
+                else:
+                    break
+            elif i == "]":
+                if not stack:
+                    stack.append(0)
+                    break
+                elif stack[-1] == "[":
+                    stack.pop()
+                else:
+                    break
+            else:
+                stack.append(i)
+    print("no" if stack else "yes")
+
+    I = input()