diff --git a/sample/sample01.bas b/sample/sample01.bas
index 9cefd8d..5868e60 100755
--- a/sample/sample01.bas
+++ b/sample/sample01.bas
@@ -2,6 +2,6 @@
 ' Copyright (c) 2011 - 2016 Wang Renxin. All rights reserved.
 ' For more information, see https://github.com/paladin-t/my_basic/
 
-s$ = "hello "
-s$ = s$ + "world"
+s$ = "Hello"
+s$ = s$ + " " + "world"
 print s$ + "!"
diff --git a/sample/sample06.bas b/sample/sample06.bas
index 2f9e96b..f7d92e8 100644
--- a/sample/sample06.bas
+++ b/sample/sample06.bas
@@ -4,19 +4,19 @@
 
 class animal
 	def speak(a)
-		print "default" + a;
+		print "Default" + a;
 	enddef
 endclass
 
 class cat(animal)
 	def speak(a)
-		print "meow" + a;
+		print "Meow" + a;
 	enddef
 endclass
 
 class dog(animal)
 	def speak(a)
-		print "woof" + a;
+		print "Woof" + a;
 	enddef
 endclass
 
diff --git a/sample/sample07.bas b/sample/sample07.bas
index fe4a95c..774cb4c 100644
--- a/sample/sample07.bas
+++ b/sample/sample07.bas
@@ -91,7 +91,7 @@ def brainfuck(cmd)
 enddef
 
 ' This is a brainfuck interpreter written with MY-BASIC
-print "BF: "
+print "Input: "
 input cmd$
 ' Use a sample code?
 if cmd$ = "hello" then