diff --git a/call.cgi b/call.cgi
index 3d796b9..e579543 100755
--- a/call.cgi
+++ b/call.cgi
@@ -115,7 +115,7 @@
         wb.remove(wb[room+u"出席表"])
         if room in form:
             ws = wb.create_sheet(title = room+u"出席表")
-            extract = [[host, str(student_no),logon[-5:],logoff[-5:], name, reading, dep]
+	    extract = [[host, str(student_no),logon[:5],logoff[-5:], name, reading, dep]
                     for host, logon, logoff, _, _,
                     student_no, name, reading, dep in lines if host.startswith(room)]