From 7e8293b3038701eb54604520fd7e8382256ba92b Mon Sep 17 00:00:00 2001
From: TooYoungTooSimp <6648049+TooYoungTooSimp@users.noreply.github.com>
Date: Sat, 7 Oct 2017 22:27:05 +0800
Subject: [PATCH] Sat, 07 Oct 2017 22:27:05 +0800

---
 OnlineJudges/Codeforces/CF869/a.py | 1 +
 OnlineJudges/Codeforces/CF869/b.py | 8 ++++++++
 2 files changed, 9 insertions(+)
 create mode 100644 OnlineJudges/Codeforces/CF869/a.py
 create mode 100644 OnlineJudges/Codeforces/CF869/b.py

diff --git a/OnlineJudges/Codeforces/CF869/a.py b/OnlineJudges/Codeforces/CF869/a.py
new file mode 100644
index 0000000..d603d08
--- /dev/null
+++ b/OnlineJudges/Codeforces/CF869/a.py
@@ -0,0 +1 @@
+print("Karen")
diff --git a/OnlineJudges/Codeforces/CF869/b.py b/OnlineJudges/Codeforces/CF869/b.py
new file mode 100644
index 0000000..5134a03
--- /dev/null
+++ b/OnlineJudges/Codeforces/CF869/b.py
@@ -0,0 +1,8 @@
+a, b = map(int, input().split())
+if b - a >= 10:
+    print(0)
+else:
+    ans = 1
+    for i in range(a + 1, b + 1):
+        ans = ans * i % 10
+    print(ans)