diff --git a/y_2015/day10.py b/y_2015/day10.py
index 5d49e76..8f2bfd9 100644
--- a/y_2015/day10.py
+++ b/y_2015/day10.py
@@ -1,4 +1,5 @@
 from common.aoc import AoCDay
+from typing import List
 
 
 class Day(AoCDay):
@@ -8,9 +9,7 @@ def __init__(self, test=0):
     def _preprocess_input(self):
         self.__input_data = self._input_data[0][0]
 
-    def say_loud(self, x: str) -> str:
-        if len(x) == 1:
-            return f"1{x[0]}"
+    def _chunkify(self, x: str) -> List[List[str]]:
         chunks = []
         chunk = [x[0]]
         for c in range(len(x)):
@@ -23,6 +22,12 @@ def say_loud(self, x: str) -> str:
                 chunks.append(chunk)
                 chunk = [x[c]]
         chunks.append(chunk)
+        return chunks
+
+    def say_loud(self, x: str) -> str:
+        if len(x) == 1:
+            return f"1{x[0]}"
+        chunks = self._chunkify(x)
         k = [str(len(i)) + i[0] for i in chunks]
         return "".join(k)
 
diff --git a/y_2015/day7.py b/y_2015/day7.py
index dd542a7..88c840b 100644
--- a/y_2015/day7.py
+++ b/y_2015/day7.py
@@ -24,8 +24,7 @@ class Operator:
 class Element:
     source: str
     operator: Optional[Operator] = None
-    result: int = 0
-    result_valid: bool = False
+    cached_result: Optional[int] = None
 
     def __post_init__(self) -> None:
         for i in list(OPERATORS.keys()):
@@ -41,18 +40,15 @@ def __compute_result(self, wires) -> int:
                 int(i) if i.isnumeric() else wires[i].resolve(wires)
                 for i in self.operator.inputs
             ]
-
             return OPERATORS[self.operator.source](*inputs)
         if self.source.isnumeric():
             return int(self.source)
         return wires[self.source].resolve(wires)
 
     def resolve(self, wires) -> int:
-        if self.result_valid:
-            return self.result
-        self.result = self.__compute_result(wires)
-        self.result_valid = True
-        return self.result
+        if not self.cached_result:
+            self.cached_result = self.__compute_result(wires)
+        return self.cached_result
 
 
 @dataclass