From a68213b0aefb6789aac1ff4ee6661c25f7979528 Mon Sep 17 00:00:00 2001
From: Masaya Tojo <masaya@tojo.tokyo>
Date: Sun, 24 Jun 2018 13:03:38 +0900
Subject: Chnage to racket/base

---
 main.rkt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/main.rkt b/main.rkt
index 95829ef..f4365c5 100644
--- a/main.rkt
+++ b/main.rkt
@@ -1,4 +1,6 @@
-#lang racket
+#lang racket/base
+(require racket/gui/base)
+(require racket/format)
 (require racket/contract)
 (require pict)
 
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