fixed error message when word in dictionary is not found

app.py

@@ -278,15 +278,17 @@ if selected == "App":
             
             # If a word has been selected by user
             if query_tag:
-                st.write(f"### {query_tag[0]}")
                 
                 # Display word information
                 if query_tag[0] in lemma_dict:
+                    st.write(f"### {query_tag[0]}")
                     data = lemma_dict[query_tag[0]]
                 elif query_tag[0].capitalize() in lemma_dict: # Some words are capitalized in the dictionary
+                    st.write(f"### {query_tag[0].capitalize()}")
                     data = lemma_dict[query_tag[0].capitalize()]
                 else:
                     st.error("Word not found in dictionary")
+                    exit(-1)
                 
                 # Put text in readable format
                 text = format_text(data)