diff --git a/lib/pynput/_util/uinput.py b/lib/pynput/_util/uinput.py
index b0a6a78..c891b83 100644
--- a/lib/pynput/_util/uinput.py
+++ b/lib/pynput/_util/uinput.py
@@ -72,6 +72,14 @@ def _device(self, paths):
             except OSError:
                 continue
 
+            # Some programmable mouse devices report each programmable input as
+            # a separate capability, so it is possible for a mouse to exceed
+            # keyboards in capability count; for this reason we will prefer a
+            # device with "keyboard" in its name
+            if 'keyboard' in next_dev.name.lower():
+                dev = next_dev
+                break
+
             # Does this device provide more handled event codes?
             capabilities = next_dev.capabilities()
             next_count = sum(
diff --git a/lib/pynput/keyboard/_uinput.py b/lib/pynput/keyboard/_uinput.py
index 2f63dd3..747d19d 100644
--- a/lib/pynput/keyboard/_uinput.py
+++ b/lib/pynput/keyboard/_uinput.py
@@ -204,10 +204,10 @@ def as_char(k):
             as_char(key): (
                 vk,
                 set()
-                    | {Key.shift} if i & 1 else set()
-                    | {Key.alt_gr} if i & 2 else set())
+                    | ({Key.shift} if i & 1 else set())
+                    | ({Key.alt_gr} if i & 2 else set()))
             for vk, keys in self._vk_table.items()
-            for i, key in enumerate(keys)
+            for i, key in reversed(list(enumerate(keys)))
             if key is not None and as_char(key) is not None}
 
     def for_vk(self, vk, modifiers):