diff --git a/src/tools/grid.py b/src/tools/grid.py
index 0a53bec..870efb3 100644
--- a/src/tools/grid.py
+++ b/src/tools/grid.py
@@ -173,6 +173,11 @@ class Grid:
     def getOnCount(self) -> int:
         return len(self.__grid)
 
+    def find(self, value: Any) -> Iterable[Coordinate]:
+        for k, v in self.__grid.items():
+            if v == value:
+                yield k
+
     def count(self, value: Any) -> int:
         return list(self.__grid.values()).count(value)
 
@@ -210,14 +215,9 @@ class Grid:
                 and self.minZ + pad <= pos[2] <= self.maxZ - pad
             )
         else:
-            return (
-                self.minX + pad <= pos[0] <= self.maxX - pad
-                and self.minY + pad <= pos[1] <= self.maxY - pad
-            )
+            return self.minX + pad <= pos[0] <= self.maxX - pad and self.minY + pad <= pos[1] <= self.maxY - pad
 
-    def getActiveCells(
-        self, x: int = None, y: int = None, z: int = None
-    ) -> Iterable[Coordinate]:
+    def getActiveCells(self, x: int = None, y: int = None, z: int = None) -> Iterable[Coordinate]:
         if x is not None or y is not None or z is not None:
             return (
                 c
@@ -229,7 +229,7 @@ class Grid:
         else:
             return self.__grid.keys()
 
-    def getRegion(self, start: Coordinate,  includeDiagonal: bool = False) -> Iterable[Coordinate]:
+    def getRegion(self, start: Coordinate, includeDiagonal: bool = False) -> Iterable[Coordinate]:
         start_value = self.get(start)
         queue = deque()
         queue.append(start)
@@ -421,9 +421,7 @@ class Grid:
                 if c in came_from and self.get(c) in walls:
                     continue
                 came_from[c] = current
-                if c == pos_to or (
-                    stop_at_first is not None and self.get(c) == stop_at_first
-                ):
+                if c == pos_to or (stop_at_first is not None and self.get(c) == stop_at_first):
                     pos_to = c
                     found_end = True
                     break
@@ -470,9 +468,7 @@ class Grid:
             if currentCoord == pos_to:
                 break
 
-            for neighbour in self.getNeighboursOf(
-                currentCoord, includeDefault=True, includeDiagonal=includeDiagonal
-            ):
+            for neighbour in self.getNeighboursOf(currentCoord, includeDefault=True, includeDiagonal=includeDiagonal):
                 if self.get(neighbour) in walls or neighbour in closedNodes:
                     continue
 
@@ -481,9 +477,7 @@ class Grid:
                 elif not includeDiagonal:
                     neighbourDist = 1
                 else:
-                    neighbourDist = currentCoord.getDistanceTo(
-                        neighbour, DistanceAlgorithm.MANHATTAN, includeDiagonal
-                    )
+                    neighbourDist = currentCoord.getDistanceTo(neighbour, DistanceAlgorithm.MANHATTAN, includeDiagonal)
 
                 targetDist = neighbour.getDistanceTo(pos_to)
                 f_cost = targetDist + neighbourDist + currentNode[1]
@@ -517,17 +511,13 @@ class Grid:
         to_z: int = None,
     ) -> "Grid":
         if self.mode3D and (from_z is None or to_z is None):
-            raise ValueError(
-                "sub_grid() on mode3d Grids requires from_z and to_z to be set"
-            )
+            raise ValueError("sub_grid() on mode3d Grids requires from_z and to_z to be set")
         count_x, count_y, count_z = 0, 0, 0
         new_grid = Grid(self.__default)
         for x in range(from_x, to_x + 1):
             for y in range(from_y, to_y + 1):
                 if not self.mode3D:
-                    new_grid.set(
-                        Coordinate(count_x, count_y), self.get(Coordinate(x, y))
-                    )
+                    new_grid.set(Coordinate(count_x, count_y), self.get(Coordinate(x, y)))
                 else:
                     for z in range(from_z, to_z + 1):
                         new_grid.set(
@@ -594,20 +584,14 @@ class Grid:
     def get_aoc_ocr_string(self, x_shift: int = 0, y_shift: int = 0):
         return convert_array_6(
             [
-                [
-                    "#" if self.get(Coordinate(x + x_shift, y + y_shift)) else "."
-                    for x in self.rangeX()
-                ]
+                ["#" if self.get(Coordinate(x + x_shift, y + y_shift)) else "." for x in self.rangeX()]
                 for y in self.rangeY()
             ]
         )
 
     def __str__(self, true_char: str = "#", false_char: str = "."):
         return "/".join(
-            "".join(
-                true_char if self.get(Coordinate(x, y)) else false_char
-                for x in range(self.minX, self.maxX + 1)
-            )
+            "".join(true_char if self.get(Coordinate(x, y)) else false_char for x in range(self.minX, self.maxX + 1))
             for y in range(self.minY, self.maxY + 1)
         )
 
@@ -623,11 +607,7 @@ class Grid:
     ) -> "Grid":
         if translate is None:
             translate = {}
-        if (
-            true_char is not None
-            and True not in translate.values()
-            and true_char not in translate
-        ):
+        if true_char is not None and True not in translate.values() and true_char not in translate:
             translate[true_char] = true_value if true_value is not None else True
 
         ret = cls(default=default)