Create Arrange consonants and vowels

Arrange consonants and vowels

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+//Arrange consonants and vowels
+
+import java.io.*;
+import java.util.*;
+
+class Node {
+    char data;
+    Node next;
+
+    public Node(char data){
+        this.data = data;
+        next = null;
+    }
+}
+
+class GFG {
+	public static void main (String[] args) {
+		Scanner sc = new Scanner(System.in);
+		int t = sc.nextInt();
+
+		while(t-- > 0) {
+		    int n = sc.nextInt();
+		    Node head = null, tail = null;
+
+		    char head_c = sc.next().charAt(0);
+		    head = new Node(head_c);
+		    tail = head;
+
+		    while(n-- > 1) {
+		        tail.next = new Node(sc.next().charAt(0));
+		        tail = tail.next;
+		    }
+
+		    Solution obj = new Solution();
+		    show(obj.arrangeCV(head));
+
+		}
+	}
+
+	public static void po(Object o) {
+	    System.out.println(o);
+	}
+
+	public static void show(Node head) {
+        while(head != null) {
+            System.out.print(head.data+" ");
+            head = head.next;
+        }
+        System.out.println();
+    }
+}
+
+Structure of node class is:
+class Node {
+    char data;
+    Node next;
+
+    public Node(char data)  {
+        this.data = data;
+        next = null;
+    }
+}
+
+Solution {
+    public Node arrangeCV(Node head){
+        Node vowel = new Node('a'), con = new Node('b');
+        Node vowelH = vowel, conH = con;
+
+        while(head != null) {
+            char temp = head.data;
+
+            if(temp == 'a' || temp == 'e' || temp == 'i' || temp == 'o' || temp == 'u') {
+                vowel.next = head;
+                vowel = vowel.next;
+            }
+
+            else {
+                con.next = head;
+                con = con.next;
+            }
+
+            head = head.next;
+        }
+
+        con.next = null;
+        vowel.next = conH.next;
+
+        return vowelH.next;
+    }
+}