diff --git a/include/aoc.hpp b/include/aoc.hpp
index 018128f..147ca4e 100644
--- a/include/aoc.hpp
+++ b/include/aoc.hpp
@@ -1,6 +1,7 @@
 #pragma once
 
-#include <vector>
+#include <array>
+#include <functional>
 
 typedef long long ll;
 typedef unsigned long long ull;
@@ -15,6 +16,15 @@ template <typename T> struct Coord {
 		this->y = y;
 	}
 
+	static inline const std::array<Coord<T>, 4> units() {
+		return {
+			Coord<T>(0, 1),
+			Coord<T>(1, 0),
+			Coord<T>(0, -1),
+			Coord<T>(-1, 0),
+		};
+	}
+
 	Coord<T> operator-() { return {-this->x, -this->y}; }
 
 	Coord<T> &operator+=(const Coord<T> &other) {
@@ -40,27 +50,6 @@ template <typename T> struct Coord {
 		y /= other;
 		return *this;
 	}
-
-	std::vector<Coord<T>> nearby(const Coord<T> &cMin, const Coord<T> &cMax) {
-		std::vector<Coord<T>> ret;
-		const T xMin = std::max(this->x - 1, cMin.x);
-		const T xMax = std::min(this->x + 1, cMax.x);
-		const T yMin = std::max(this->y - 1, cMin.y);
-		const T yMax = std::min(this->y + 1, cMax.y);
-		for (T x = xMin; x <= xMax; x++) {
-			for (T y = yMin; y <= yMax; y++) {
-				Coord<T> xy(x, y);
-				if (*this != xy) {
-					ret.push_back(xy);
-				}
-			}
-		}
-		return ret;
-	}
-
-	std::vector<Coord<T>> nearby(const Coord<T> &cMax) {
-		return this->nearby(Coord<T>(), cMax);
-	}
 };
 
 template <typename T>