diff --git a/Exit-Code-Mappings.md b/Exit-Code-Mappings.md
index d3ae2dc..a086487 100644
--- a/Exit-Code-Mappings.md
+++ b/Exit-Code-Mappings.md
@@ -57,18 +57,18 @@ Runner: https://github.com/ReCodEx/utils/blob/master/runners/py/runner.py
 | Exit Code | Exception | Mapping |
 | --------- | --------- | ------- |
 | 0 | --- | OK |
-| 1 | BaseException | ??? |
-| 101 | AssertionError | ??? |
-| 102 | TypeError | ??? |
-| 103 | NameError | ??? |
-| 104 | EOFError | ??? |
-| 105 | AttributeError | ??? |
-| 106 | IOError | ??? |
-| 107 | OSError | ??? |
-| 108 | LookupError | ??? |
-| 109 | ValueError | ??? |
-| 110 | ZeroDivisionError | ??? |
-| 111 | ArithmeticError | ??? |
-| 112 | ImportError | ??? |
-| 113 | MemoryError | ??? |
-| 114 | SyntaxError | ??? |
+| 1 | BaseException | Unhandled exception |
+| 101 | AssertionError | Assertion error |
+| 102 | TypeError | Type error |
+| 103 | NameError | Name not found error |
+| 104 | EOFError | End of file error |
+| 105 | AttributeError | Attribute access failed |
+| 106 | IOError | IO error |
+| 107 | OSError | OS error |
+| 108 | LookupError | Lookup error |
+| 109 | ValueError | Value error |
+| 110 | ZeroDivisionError | Zero division error |
+| 111 | ArithmeticError | Arithmetic error |
+| 112 | ImportError | Import error |
+| 113 | MemoryError | Memory allocation error |
+| 114 | SyntaxError | Syntax error |