diff --git a/AoC21.xcodeproj/project.pbxproj b/AoC21.xcodeproj/project.pbxproj
index 9d36372..1ca7e06 100644
--- a/AoC21.xcodeproj/project.pbxproj
+++ b/AoC21.xcodeproj/project.pbxproj
@@ -7,6 +7,8 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		2615545A276A6C2C00374D18 /* day14.swift in Sources */ = {isa = PBXBuildFile; fileRef = 26155459276A6C2C00374D18 /* day14.swift */; };
+		2615545B276A6C3200374D18 /* common.swift in Sources */ = {isa = PBXBuildFile; fileRef = 269BE5CB2762A08800871C85 /* common.swift */; };
 		261F317F2763DACC0018D49C /* day10.swift in Sources */ = {isa = PBXBuildFile; fileRef = 261F317E2763DACC0018D49C /* day10.swift */; };
 		261F31802763DACE0018D49C /* common.swift in Sources */ = {isa = PBXBuildFile; fileRef = 269BE5CB2762A08800871C85 /* common.swift */; };
 		263BA5B3275E97AA00839C92 /* day5part2.swift in Sources */ = {isa = PBXBuildFile; fileRef = 263BA5B2275E97AA00839C92 /* day5part2.swift */; };
@@ -26,6 +28,15 @@
 /* End PBXBuildFile section */
 
 /* Begin PBXCopyFilesBuildPhase section */
+		26155450276A6C1C00374D18 /* CopyFiles */ = {
+			isa = PBXCopyFilesBuildPhase;
+			buildActionMask = 2147483647;
+			dstPath = /usr/share/man/man1/;
+			dstSubfolderSpec = 0;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 1;
+		};
 		261F31752763DAB60018D49C /* CopyFiles */ = {
 			isa = PBXCopyFilesBuildPhase;
 			buildActionMask = 2147483647;
@@ -101,6 +112,8 @@
 /* End PBXCopyFilesBuildPhase section */
 
 /* Begin PBXFileReference section */
+		26155452276A6C1C00374D18 /* Day14 */ = {isa = PBXFileReference; explicitFileType = "compiled.mach-o.executable"; includeInIndex = 0; path = Day14; sourceTree = BUILT_PRODUCTS_DIR; };
+		26155459276A6C2C00374D18 /* day14.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = day14.swift; sourceTree = "<group>"; };
 		261F31772763DAB60018D49C /* Day10 */ = {isa = PBXFileReference; explicitFileType = "compiled.mach-o.executable"; includeInIndex = 0; path = Day10; sourceTree = BUILT_PRODUCTS_DIR; };
 		261F317E2763DACC0018D49C /* day10.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = day10.swift; sourceTree = "<group>"; };
 		263BA5AB275E978400839C92 /* Day5Part2 */ = {isa = PBXFileReference; explicitFileType = "compiled.mach-o.executable"; includeInIndex = 0; path = Day5Part2; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -121,6 +134,13 @@
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
+		2615544F276A6C1C00374D18 /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		261F31742763DAB60018D49C /* Frameworks */ = {
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
@@ -183,6 +203,7 @@
 		263BA594275E974800839C92 = {
 			isa = PBXGroup;
 			children = (
+				26155459276A6C2C00374D18 /* day14.swift */,
 				265112962767D16D009B7607 /* day13.swift */,
 				263CCF76276606670061B353 /* day12.swift */,
 				263CCF69276606010061B353 /* day11.swift */,
@@ -207,6 +228,7 @@
 				263CCF61276605320061B353 /* Day11 */,
 				263CCF6F2766065B0061B353 /* Day12 */,
 				2651128F2767D15A009B7607 /* Day13 */,
+				26155452276A6C1C00374D18 /* Day14 */,
 			);
 			name = Products;
 			sourceTree = "<group>";
@@ -214,6 +236,23 @@
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
+		26155451276A6C1C00374D18 /* Day14 */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = 26155458276A6C1C00374D18 /* Build configuration list for PBXNativeTarget "Day14" */;
+			buildPhases = (
+				2615544E276A6C1C00374D18 /* Sources */,
+				2615544F276A6C1C00374D18 /* Frameworks */,
+				26155450276A6C1C00374D18 /* CopyFiles */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+			);
+			name = Day14;
+			productName = Day14;
+			productReference = 26155452276A6C1C00374D18 /* Day14 */;
+			productType = "com.apple.product-type.tool";
+		};
 		261F31762763DAB60018D49C /* Day10 */ = {
 			isa = PBXNativeTarget;
 			buildConfigurationList = 261F317D2763DAB60018D49C /* Build configuration list for PBXNativeTarget "Day10" */;
@@ -360,6 +399,10 @@
 				LastSwiftUpdateCheck = 1310;
 				LastUpgradeCheck = 1310;
 				TargetAttributes = {
+					26155451276A6C1C00374D18 = {
+						CreatedOnToolsVersion = 13.1;
+						LastSwiftMigration = 1310;
+					};
 					261F31762763DAB60018D49C = {
 						CreatedOnToolsVersion = 13.1;
 						LastSwiftMigration = 1310;
@@ -412,11 +455,21 @@
 				263CCF60276605320061B353 /* Day11 */,
 				263CCF6E2766065B0061B353 /* Day12 */,
 				2651128E2767D15A009B7607 /* Day13 */,
+				26155451276A6C1C00374D18 /* Day14 */,
 			);
 		};
 /* End PBXProject section */
 
 /* Begin PBXSourcesBuildPhase section */
+		2615544E276A6C1C00374D18 /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				2615545B276A6C3200374D18 /* common.swift in Sources */,
+				2615545A276A6C2C00374D18 /* day14.swift in Sources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		261F31732763DAB60018D49C /* Sources */ = {
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
@@ -492,6 +545,41 @@
 /* End PBXSourcesBuildPhase section */
 
 /* Begin XCBuildConfiguration section */
+		26155456276A6C1C00374D18 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				CLANG_ENABLE_MODULES = YES;
+				CODE_SIGN_STYLE = Automatic;
+				DEVELOPMENT_TEAM = 722B335UM5;
+				ENABLE_HARDENED_RUNTIME = YES;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/../Frameworks",
+					"@loader_path/../Frameworks",
+				);
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 5.0;
+			};
+			name = Debug;
+		};
+		26155457276A6C1C00374D18 /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				CLANG_ENABLE_MODULES = YES;
+				CODE_SIGN_STYLE = Automatic;
+				DEVELOPMENT_TEAM = 722B335UM5;
+				ENABLE_HARDENED_RUNTIME = YES;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/../Frameworks",
+					"@loader_path/../Frameworks",
+				);
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 5.0;
+			};
+			name = Release;
+		};
 		261F317B2763DAB60018D49C /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
@@ -851,6 +939,15 @@
 /* End XCBuildConfiguration section */
 
 /* Begin XCConfigurationList section */
+		26155458276A6C1C00374D18 /* Build configuration list for PBXNativeTarget "Day14" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				26155456276A6C1C00374D18 /* Debug */,
+				26155457276A6C1C00374D18 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
 		261F317D2763DAB60018D49C /* Build configuration list for PBXNativeTarget "Day10" */ = {
 			isa = XCConfigurationList;
 			buildConfigurations = (
diff --git a/day14.swift b/day14.swift
index 692fa14..3ad017e 100644
--- a/day14.swift
+++ b/day14.swift
@@ -1,5 +1,5 @@
 @main
-struct Day14 {
+struct Day14: Puzzle {
     mutating func run() {
         let part1 = calculate(start, depth: 10)
         print("Part 1:", part1.values.max()! - part1.values.min()!)