fix report

src/ChomskyChecker.java

@@ -0,0 +1,40 @@
+import java.util.List;
+import java.util.Map;
+
+public class ChomskyChecker {
+    public static String classifyGrammar(Map<String, List<String>> grammar) {
+        for (Map.Entry<String, List<String>> entry : grammar.entrySet()) {
+            for (String listEntry : entry.getValue()) {
+                String prod = entry.getKey() + " -> " + listEntry;
+                if (isType3(prod)) {
+                    return "Regular";
+                } else if (isType2(prod)) {
+                    return "Context-free";
+                } else if (isType1(prod)) {
+                    return "Context-sensitive";
+                } else if (isType0(prod)) {
+                    return "Unrestricted";
+                }
+            }
+
+        }
+        return "Unknown";
+    }
+
+    private static boolean isType0(String production) {
+        return production.matches("^[^ ]+ -> .+$");
+    }
+
+    private static boolean isType1(String production) {
+        return production.matches("^.+ .+ .+$");
+    }
+
+    private static boolean isType2(String production) {
+        return production.matches("^[A-Z]+ -> [^A-Z]+$");
+    }
+
+    private static boolean isType3(String production) {
+        return production.matches("^[A-Z]+ -> [a-zA-Z]$") || production.matches("^[A-Z]+ -> [a-zA-Z][A-Z]$");
+    }
+
+}