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

storage/zeta/py/completed/15651.py

@@ -0,0 +1,11 @@
+N, M = map(int, input().split())
+trace = [([i], M) for i in range(N, 0, -1)]  # prev, depth
+
+while trace:
+    p, d = trace.pop()
+    if d == 1:
+        print(" ".join(map(str, p)))
+        continue
+    for i in range(N, 0, -1):
+        trace.append((p + [i], d-1))
+# 킹트래킹