diff --git a/zeta_python/15649_backtracking.py b/zeta_python/15649_backtracking.py
deleted file mode 100644
index e69de29..0000000
diff --git a/zeta_python/completed/15649_backtracking.py b/zeta_python/completed/15649_backtracking.py
new file mode 100644
index 0000000..ab02994
--- /dev/null
+++ b/zeta_python/completed/15649_backtracking.py
@@ -0,0 +1,10 @@
+N, M = map(int, input().split())
+trace = [(list(range(1, N + 1)), M, [])]
+
+while trace:
+    n, m, d = trace.pop()
+    for i in range(len(n) - 1, -1, -1):
+        trace.append((n[:i] + n[i + 1:], m - 1, d + [n[i]]))
+    if m == 0:
+        print(" ".join(map(str, d)))
+# 아마도 백트래킹일거임 아마도 그럼 ㅇㅇ
diff --git a/zeta_python/completed/15650.py b/zeta_python/completed/15650.py
new file mode 100644
index 0000000..a1ecf59
--- /dev/null
+++ b/zeta_python/completed/15650.py
@@ -0,0 +1,11 @@
+N, M = map(int, input().split())
+trace = [([i], M, i) for i in range(N, 0, -1)]  # prev, depth, now
+
+while trace:
+    p, d, n = trace.pop()
+    for i in range(N, n, -1):
+        trace.append((p + [i], d-1, i))
+
+    if d == 1:
+        print(" ".join(map(str, p)))
+# 아마도 백트래킹일거임 아마도 그럼 ㅇㅇ
diff --git a/zeta_python/completed/15651.py b/zeta_python/completed/15651.py
new file mode 100644
index 0000000..c2ec52a
--- /dev/null
+++ b/zeta_python/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
diff --git a/zeta_python/completed/15652.py b/zeta_python/completed/15652.py
new file mode 100644
index 0000000..f954007
--- /dev/null
+++ b/zeta_python/completed/15652.py
@@ -0,0 +1,12 @@
+N, M = map(int, input().split())
+trace = [([i], M, i) for i in range(N, 0, -1)]  # prev, depth, now
+
+while trace:
+    p, d, n = trace.pop()
+    if d == 1:
+        print(" ".join(map(str, p)))
+        continue
+    for i in range(N, n-1, -1):
+        trace.append((p + [i], d-1, i))
+
+# 코드 재사용 팝트래킹
diff --git a/zeta_python/completed/15654.py b/zeta_python/completed/15654.py
new file mode 100644
index 0000000..452af12
--- /dev/null
+++ b/zeta_python/completed/15654.py
@@ -0,0 +1,10 @@
+N, M = map(int, input().split())
+trace = [(sorted(list(map(int, input().split()))), M, [])]
+
+while trace:
+    n, m, d = trace.pop()
+    for i in range(len(n) - 1, -1, -1):
+        trace.append((n[:i] + n[i + 1:], m - 1, d + [n[i]]))
+    if m == 0:
+        print(" ".join(map(str, d)))
+# 아마도 백트래킹일거임 아마도 그럼 ㅇㅇ
diff --git a/zeta_python/completed/15655.py b/zeta_python/completed/15655.py
new file mode 100644
index 0000000..5e4007e
--- /dev/null
+++ b/zeta_python/completed/15655.py
@@ -0,0 +1,13 @@
+N, M = map(int, input().split())
+K = list(map(int, input().split()));K.sort()
+trace = [([v], M, i) for i, v in reversed(list(enumerate(K)))]  # prev, depth, now
+
+while trace:
+    p, d, n = trace.pop()
+    if d == 1:
+        print(" ".join(map(str, p)))
+        continue
+    for i in range(N-1, n, -1):
+        trace.append((p + [K[i]], d-1, i))
+
+# 아마도 백트래킹일거임 아마도 그럼 ㅇㅇ
diff --git a/zeta_python/completed/15656.py b/zeta_python/completed/15656.py
new file mode 100644
index 0000000..3a3329d
--- /dev/null
+++ b/zeta_python/completed/15656.py
@@ -0,0 +1,13 @@
+N, M = map(int, input().split())
+K = list(map(int, input().split()));K.sort()
+trace = [([v], M, i) for i, v in reversed(list(enumerate(K)))]  # prev, depth, now
+
+while trace:
+    p, d, n = trace.pop()
+    if d == 1:
+        print(" ".join(map(str, p)))
+        continue
+    for i in range(N-1, -1, -1):
+        trace.append((p + [K[i]], d-1, i))
+
+# 아마도 백트래킹일거임 아마도 그럼 ㅇㅇ
diff --git a/zeta_python/completed/15657.py b/zeta_python/completed/15657.py
new file mode 100644
index 0000000..6cdfbb3
--- /dev/null
+++ b/zeta_python/completed/15657.py
@@ -0,0 +1,13 @@
+N, M = map(int, input().split())
+K = list(map(int, input().split()));K.sort()
+trace = [([v], M, i) for i, v in reversed(list(enumerate(K)))]  # prev, depth, now
+
+while trace:
+    p, d, n = trace.pop()
+    if d == 1:
+        print(" ".join(map(str, p)))
+        continue
+    for i in range(N-1, n-1, -1):
+        trace.append((p + [K[i]], d-1, i))
+
+# 아마도 백트래킹일거임 아마도 그럼 ㅇㅇ