diff --git a/youngjin.han/python-the-hard-way/calc.py b/youngjin.han/python-the-hard-way/calc.py
index 0094023..5bfd45b 100644
--- a/youngjin.han/python-the-hard-way/calc.py
+++ b/youngjin.han/python-the-hard-way/calc.py
@@ -25,7 +25,7 @@ def input_and_calculate_one_line():
             l_s_result += f"{l_result}"
         except:
             l_s_result = f"input error : input string = {l_input_string}"
-            print("Only numbers and spaces")
+            print(l_s_result)
 
     return l_s_result