diff --git a/src/day_eight.ts b/src/day_eight.ts
index d05bc6e..6411094 100644
--- a/src/day_eight.ts
+++ b/src/day_eight.ts
@@ -1,7 +1,6 @@
-import {anyCharOf, int, newline, uniDecimal, uniLetter, whitespace} from "parjs";
+import {anyCharOf, newline, uniDecimal, uniLetter, whitespace} from "parjs";
 import {between, exactly, manySepBy, manyTill, or, stringify, then} from "parjs/combinators";
 import fs from "fs";
-import { Set } from 'immutable';
 
 const patternParser = anyCharOf("LR").pipe(manyTill(newline().pipe(exactly(2))));
 
@@ -90,14 +89,10 @@ export class DesertMap {
 		return step;
 	}
 
-	private isComplete(keys: string[]) {
-		return keys.every(key => key.endsWith('Z'));
-	}
-
 	public ghostStepsToZ(): number {
 		let keys = Object.keys(this.map).filter(key => key.endsWith('A'));
 
-		return keys.map(key => this.stepsToZ(key)).reduce(lcm, 1);
+		return keys.map(key => this.stepsToZ(key)).reduce(lcm);
 	}
 }