Problem: The round carousel consists of n figures of animals. Figures are numbered from 1 to n in order of the carousel moving. Thus, after the n-th figure the figure with the number 1 follows. Each figure has its own type — the type of the animal corresponding to this figure (the horse, the tiger and so on). The type of animal of the i-th figure equals t_i.

<image> The example of the carousel for n=9 and t=[5, 5, 1, 15, 1, 5, 5, 1, 1]. 

You want to color each figure in one of the colors. You think that it's boring if the carousel contains two different figures (with the distinct types of animals) going one right after another and colored in the same color.

Your task is to color the figures in such a way that the number of distinct colors used is the minimum possible and there are no figures of the different types going one right after another and colored in the same color. If you use exactly k distinct colors, then the colors of figures should be denoted with integers from 1 to k.

Input

The input contains one or more test cases.

The first line contains one integer q (1 ≤ q ≤ 10^4) — the number of test cases in the test. Then q test cases follow. One test case is given on two lines.

The first line of the test case contains one integer n (3 ≤ n ≤ 2 ⋅ 10^5) — the number of figures in the carousel. Figures are numbered from 1 to n in order of carousel moving. Assume that after the n-th figure the figure 1 goes.

The second line of the test case contains n integers t_1, t_2, ..., t_n (1 ≤ t_i ≤ 2 ⋅ 10^5), where t_i is the type of the animal of the i-th figure.

The sum of n over all test cases does not exceed 2⋅10^5.

Output

Print q answers, for each test case print two lines.

In the first line print one integer k — the minimum possible number of distinct colors of figures.

In the second line print n integers c_1, c_2, ..., c_n (1 ≤ c_i ≤ k), where c_i is the color of the i-th figure. If there are several answers, you can print any.

Example

Input


4
5
1 2 1 2 2
6
1 2 2 1 2 2
5
1 2 1 2 3
3
10 10 10


Output


2
1 2 1 2 2
2
2 1 2 1 2 1
3
2 3 2 3 1
1
1 1 1 

Solution (in JAVA):

Solution:
//package com.company;
import java.io.*;
import java.util.*;
import java.lang.*;
public class Main{
    public static class FastReader {
        private InputStream stream;
        private byte[] buf = new byte[1024];
        private int curChar;
        private int numChars;
        private SpaceCharFilter filter;
        public FastReader(InputStream stream) {
            this.stream = stream;
        }
        public int read() {
            if (numChars==-1)
                throw new InputMismatchException();
            if (curChar >= numChars) {
                curChar = 0;
                try {
                    numChars = stream.read(buf);
                }
                catch (IOException e) {
                    throw new InputMismatchException();
                }
                if(numChars <= 0)
                    return -1;
            }
            return buf[curChar++];
        }
        public String nextLine() {
            BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
            String str = "";
            try {
                str = br.readLine();
            }
            catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }
        public int nextInt() {
            int c = read();
            while(isSpaceChar(c))
                c = read();
            int sgn = 1;
            if (c == '-') {
                sgn = -1;
                c = read();
            }
            int res = 0;
            do {
                if(c<'0'||c>'9')
                    throw new InputMismatchException();
                res *= 10;
                res += c - '0';
                c = read();
            }
            while (!isSpaceChar(c));
            return res * sgn;
        }
        public long nextLong() {
            int c = read();
            while (isSpaceChar(c))
                c = read();
            int sgn = 1;
            if (c == '-') {
                sgn = -1;
                c = read();
            }
            long res = 0;
            do {
                if (c < '0' || c > '9')
                    throw new InputMismatchException();
                res *= 10;
                res += c - '0';
                c = read();
            }
            while (!isSpaceChar(c));
            return res * sgn;
        }
        public double nextDouble() {
            int c = read();
            while (isSpaceChar(c))
                c = read();
            int sgn = 1;
            if (c == '-') {
                sgn = -1;
                c = read();
            }
            double res = 0;
            while (!isSpaceChar(c) && c != '.') {
                if (c == 'e' || c == 'E')
                    return res * Math.pow(10, nextInt());
                if (c < '0' || c > '9')
                    throw new InputMismatchException();
                res *= 10;
                res += c - '0';
                c = read();
            }
            if (c == '.') {
                c = read();
                double m = 1;
                while (!isSpaceChar(c))
                {
                    if (c == 'e' || c == 'E')
                        return res * Math.pow(10, nextInt());
                    if (c < '0' || c > '9')
                        throw new InputMismatchException();
                    m /= 10;
                    res += (c - '0') * m;
                    c = read();
                }
            }
            return res * sgn;
        }
        public char nextChar() {
            int c = read();
            while (isSpaceChar(c))
                c = read();
            return (char)c;
        }
        public String next() {
            int c = read();
            while (isSpaceChar(c))
                c = read();
            StringBuilder res = new StringBuilder();
            do {
                res.appendCodePoint(c);
                c = read();
            }
            while (!isSpaceChar(c));
            return res.toString();
        }
        public boolean isSpaceChar(int c) {
            if (filter != null)
                return filter.isSpaceChar(c);
            return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
        }
        public interface SpaceCharFilter {
            public boolean isSpaceChar(int ch);
        }
    }
    static long gcd(long a, long b){
        if (a == 0)
            return b;  
        return gcd(b % a, a);  
    }
    static long lcm(long a, long b)  {
        return (a*b)/gcd(a, b);  
    }
    public static void sortbyColumn(int arr[][], int col) 
    { 
        
        Arrays.sort(arr, new Comparator<int[]>() { 
            
          @Override              
          
          public int compare(final int[] entry1,  
                             final int[] entry2) { 
  
            
            if (entry1[col] > entry2[col]) 
                return 1; 
            else
                return -1; 
          } 
        });  
    } 
    static LinkedList<Integer> li[]=new LinkedList[100001];
    static int ans1=0,ans2=0,max1=-1;
    static int visit[]=new int[100001];
    static int visited[]=new int[100001];
    //static int arr[];
    static ArrayList<Integer> adj[];
    static void dfs(int x,int level){
        // //visit[x]=1;
        // if(parent==-1){
        //     ans2++;
        // }else{
        //     if(visited[parent]==0){
        //         ans2++;
        //         visited[parent]=1;
        //         System.out.println("here");
        //     }
        // }
        // //ans1++;
        // System.out.println(adj[0].get(0)+" "+adj[0].get(1)+" "+parent);
        // for(int i=0;i<adj[x].size();i++){
        //     //System.out.println("Here at "+x+" and "+adj[x].get(i));
        //     if(arr[x]==-1){
        //         if(ans1<ans2){
        //             ans1=ans2;
        //         }
        //         ans2=1;
        //     }
        //     if(visit[adj[x].get(i)]==0){
        //         dfs(adj[x].get(i),x);
        //     }
        // }
        // if(ans1<ans2){
        //     ans1=ans2;
        // }
        max1=Math.max(max1,level);
        for(int i=0;i<adj[x].size();i++)
        {
          // System.out.println(adj[root].get(i));
            dfs(adj[x].get(i),level+1);
            
        }
    } 
    
    public static void main(String args[]){
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        FastReader in = new FastReader(inputStream); 
        PrintWriter w = new PrintWriter(outputStream);
        int t,i,j;
        t=in.nextInt();
        for(i=0;i<t;i++){
            int n=in.nextInt(),flag=1,check=0;
            int arr[]=new int[n];
            int ans[]=new int[n];
            for(j=0;j<n;j++){
                arr[j]=in.nextInt();
            }
            for(j=0;j<n;j++){
                if(j==0){
                    ans[j]=1;
                    continue;
                }
                else{
                    if(arr[j]==arr[j-1]){
                        check++;
                        ans[j]=ans[j-1];
                    }else{
                        flag=2;
                        if(ans[j-1]==1){
                            ans[j]=2;
                        }else{
                            ans[j]=1;
                        }
                    }
                }
            }
            if(arr[0]!=arr[n-1]&&ans[0]==ans[n-1]){
                ans[n-1]=3;
                flag=3;
            }
            if(flag>2){
                if(n%2==0){
                    for(j=0;j<n;j++){
                        if(j%2==0){
                            ans[j]=1;
                        }else{
                            ans[j]=2;
                        }
                    }
                    flag=2;
                }
            }
            if(flag>2&&check>0){
                flag=2;
                int ran=0;
                for(j=0;j<n-1;j++){
                    if(arr[j]==arr[j+1]){
                        ans[j+1]=ans[j];
                        ran=j+2;
                        break;
                    }else{
                        if(j%2==0){
                            ans[j]=1;
                        }else{
                            ans[j]=2;
                        }
                    }
                }
                for(j=ran;j<n;j++){
                    if(ans[j-1]==1){
                        ans[j]=2;
                    }else{
                        ans[j]=1;
                    }
                }
            }
            w.println(flag);
            for(j=0;j<n;j++){
                w.print(ans[j]+" ");
            }
            w.println();
        }
        w.close();
    }
   
}