Update app.py

app.py

@@ -76,5 +76,5 @@ if radio_bar == description4 :
     char_num = st.number_input(label="Number of characters to remove:",value=0)
     all_data = st.button("Show result")
     if all_data:
-        result = change_str(str1)
+        result = change_str(str2,char_num)
         st.success(result)