--- kf_02-27T08-43-03-067303.py
+++ kf_03-02T15-25-10-840374.py
@@ -1 +1,65 @@
 
+class Name:
+    def __init__(self, name: str):
+        self.name = str(name)
+class Symbol:
+    def __init__(self, symbol: str):
+        self.symbol = str(symbol)
+class Unit:
+    def __init__(self, name: Name, symbols: list[Symbol]):
+        if not isinstance(name, Name):
+            raise TypeError('name must be a Name instance.')
+        if not isinstance(symbols, list) or not symbols or any(not isinstance(symbol, Symbol) for symbol in symbols):
+            raise TypeError('symbols must be a non-empty list of Symbol instances.')
+        self.name = name
+        self.symbols = list(symbols)
+meter_unit = Unit(name=Name('meter'), symbols=[Symbol('m')])
+centimeter_unit = Unit(name=Name('centimeter'), symbols=[Symbol('cm')])
+gram_unit = Unit(name=Name('gram'), symbols=[Symbol('g')])
+kilogram_unit = Unit(name=Name('kilogram'), symbols=[Symbol('kg')])
+class Value:
+    def __init__(self, number: float, unit: Unit):
+        if unit is None:
+            raise ValueError('unit is required.')
+        if not isinstance(unit, Unit):
+            raise TypeError('unit must be a Unit instance.')
+        self.number = float(number)
+        self.unit = unit
+    def convert_to(self, target_unit: Unit) -> 'Value':
+        if not isinstance(target_unit, Unit):
+            raise TypeError('target_unit must be a Unit instance.')
+        source_name = self.unit.name.name
+        target_name = target_unit.name.name
+        if source_name == target_name:
+            return Value(self.number, self.unit)
+        factor = unit_conversion_factors.get((source_name, target_name))
+        if factor is None:
+            raise ValueError(f'No conversion from {source_name} to {target_name}.')
+        return Value(self.number * factor, target_unit)
+class Distance:
+    def __init__(self, value: Value):
+        if not isinstance(value, Value):
+            raise TypeError('value must be a Value instance.')
+        if value.unit.name.name not in {'meter', 'centimeter'}:
+            raise ValueError('Distance only accepts meter or centimeter units.')
+        self.value = value
+unit_conversion_factors: dict[tuple[str, str], float] = {
+    ('meter', 'centimeter'): 100.0,
+    ('centimeter', 'meter'): 0.01,
+    ('gram', 'kilogram'): 0.001,
+    ('kilogram', 'gram'): 1000.0,
+}
+def distance_validation_probe() -> dict[str, bool]:
+    value_requires_unit = False
+    distance_in_kg_rejected = False
+    distance_in_m_ok = False
+    try:
+        Value(5, None)
+    except ValueError:
+        value_requires_unit = True
+    try:
+        Distance(Value(2.0, kilogram_unit))
+    except ValueError:
+        distance_in_kg_rejected = True
+    distance_in_m_ok = Distance(Value(2.0, meter_unit)).value.unit.name.name == 'meter'
+    return dict(value_requires_unit=value_requires_unit, distance_in_kg_rejected=distance_in_kg_rejected, distance_in_m_ok=distance_in_m_ok)