diff --git a/main.py b/main.py
index 8f103e1..5f305fa 100644
--- a/main.py
+++ b/main.py
@@ -34,7 +34,6 @@ if __name__ == "__main__":
     }
     for expression in expressions:
         try: 
-            print(f"[green]== Parsing: [yellow]{expression}[/yellow] ==[/green]")
             parse_expression(expression)
         except Exception as e:
-            print(f"[red]Failed parsing {expression}[/red]: {e}")
+            print(f"[red]Failed on {expression}[/red]: {str(e)[0:40]}...")
diff --git a/repl.py b/repl.py
new file mode 100644
index 0000000..92820da
--- /dev/null
+++ b/repl.py
@@ -0,0 +1,16 @@
+from ziffers import *
+from rich import print
+
+EXIT_CONDITION = ('exit', 'quit', '')
+
+if __name__ == "__main__":
+    print(f"[purple]== ZIFFERS REPL ==[/purple]")
+    while True:
+        expr = input('> ')
+        if expr not in EXIT_CONDITION:
+            try:
+                parse_expression(expr)
+            except Exception as e:
+                print(f"[red]Failed:[/red] {e}")
+        else:
+            exit()
diff --git a/ziffers/__pycache__/ebnf.cpython-310.pyc b/ziffers/__pycache__/ebnf.cpython-310.pyc
index 83138c0..4de9599 100644
Binary files a/ziffers/__pycache__/ebnf.cpython-310.pyc and b/ziffers/__pycache__/ebnf.cpython-310.pyc differ
diff --git a/ziffers/ebnf.py b/ziffers/ebnf.py
index 486b026..972154f 100644
--- a/ziffers/ebnf.py
+++ b/ziffers/ebnf.py
@@ -1,5 +1,5 @@
 ebnf = r"""
-    expr = (number ws?)* 
+    expr = (number ws?)+ 
     number = factor additive*
     additive = ("+"/"-") factor
     factor = primary multiplicative*