diff --git a/avro/core/validate.py b/avro/core/validate.py
index 73e6115..c3f6d2e 100755
--- a/avro/core/validate.py
+++ b/avro/core/validate.py
@@ -69,8 +69,13 @@ def fix_string_case(text: str) -> str:
     return "".join(fixed)
 
 
-# ASCII-specific validation functions.
-# These are used for validating output while converting to ASCII after the initial conversion.
+# Conversion-specific validation functions.
+# These are only used for converting to and from ASCII characters.
+def is_bangla_kar(char: str) -> bool:
+    """
+    Check if given character is a Bengali kar.
+    """
+    return char in config.AVRO_KAR
 
 
 def is_bangla_prekar(char: str) -> bool:
@@ -88,13 +93,6 @@ def is_bangla_postkar(char: str) -> bool:
     return char in config.BIJOY_POSTKAR
 
 
-def is_bangla_kar(char: str) -> bool:
-    """
-    Check if given character is a Bengali kar.
-    """
-    return is_bangla_prekar(char) or is_bangla_postkar(char)
-
-
 def is_bangla_banjonborno(char: str) -> bool:
     """
     Check if given character is a Bengali banjonborno.
diff --git a/avro/main.py b/avro/main.py
index a006eef..5892fb5 100755
--- a/avro/main.py
+++ b/avro/main.py
@@ -15,8 +15,7 @@
 from typing import Callable, Generator, List, Tuple, Union
 
 # Import local modules.
-from . import processor
-from .core import validate
+from .core import processor, validate
 from .core.config import BIJOY_MAP, BIJOY_MAP_REVERSE