deleted unnecessary variable

ChatGPTParsing/src/reader/Reader.java

@@ -26,8 +26,7 @@ public class Reader {
 			for (List<String> option : options) {
 				String o = optionToString(option);
 				sb.replace(leftIndex, rightIndex, o);
-				String next = sb.toString();
-				if (!next.equals(derivation[i + 1])) {
+				if (!sb.toString().equals(derivation[i + 1])) {
 					sb.delete(leftIndex, leftIndex + o.length());
 					sb.insert(leftIndex, v);
 				} else {
@@ -70,8 +69,8 @@ public class Reader {
 
 	public static void main(String[] args) {
 		Reader r = new Reader();
-		String[] d = { "S", "bS", "bbS", "bbaA", "bbabA", "bbabaS", "bbababS", "bbabab" };
-		String gString = "G = (V, T, R, S)\nV = {S, A}\nT = {a, b}\nR = {S -> aA | bS | ε,\n     A -> aS | bA}";
+		String[] d = { "S", "TVaW", "aUVaW", "aVaW", "aaaW", "aaabXab", "aaabXbab", "aaabXbbab", "aaabbbab" };
+		String gString = "G = (V, T, R, S)\nV = {S, T, U, V, W, X}\nT = {a, b}\nR = {S -> TVaW,\n     T -> aU,\n     U -> UabU | ε,\n     V -> a,\n     W -> Xab | bXab,\n     X -> Xb | ε}";
 		System.out.println(r.checkDerivation(gString, d));
 	}