diff --git a/Exercises/src/day_3/StringCheck.java b/Exercises/src/day_3/StringCheck.java
index 06854b4..6048c3e 100644
--- a/Exercises/src/day_3/StringCheck.java
+++ b/Exercises/src/day_3/StringCheck.java
@@ -131,8 +131,17 @@ public class StringCheck {
 
 	public static String inputString () {
 		Scanner scann = new Scanner(System.in);
-    	String Line = scann.nextLine();
-    	return Line.strip();
+		try { // day 3 stept 6
+			String Line = scann.nextLine();
+			return Line.strip();
+		}catch(Exception e){
+			
+			System.out.println("大変申し訳ございません、システム中断");
+			System.exit(0);
+			return"";
+		}
+    	
+    	
     	
 		
 	}