diff --git a/algorithms/a_star.py b/algorithms/a_star.py
index 0d3ba5f..c657c1e 100644
--- a/algorithms/a_star.py
+++ b/algorithms/a_star.py
@@ -145,3 +145,7 @@ def h(state: State, goal: Tuple[int, int]) -> int:
 def f(current_node: Node, goal: Tuple[int, int]) -> int:
     """f(n) = g(n) + h(n), g stands for current cost, h for heuristics"""
     return current_node.cost + h(state=current_node.state, goal=goal)
+
+
+def a_star(state: State, grid: List[List[str]], goals: List[Tuple[int, int]]) -> List[str]:
+    return []