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:
import java.io.*;
import java.util.*;
import java.text.*;
import java.lang.*;
import java.math.*;

public class Main{
	
	public void solve () throws IOException  {
       
    	InputReader in = new InputReader(System.in);
        PrintWriter pw = new PrintWriter(System.out);
        int t = in.nextInt();
        outer:
        while(t-- > 0) {
        	pw.println();
        	int n = in.nextInt();
        	int a[] = new int [n];
        	for(int i = 0 ; i < n ; i++) {
        		a[i] = in.nextInt();
        	}
        	boolean chk = true;
        	for(int i  = 1 ; i < n ; i++) {
        		chk &= (a[i] == a[0]);
        	}
        	if(chk) {
        		pw.println(1);
        		for(int i  = 0 ; i< n ; i++)
        			pw.print(1+" ");
        		continue outer;
        	}
        	
           boolean dp[][] = new boolean [n][2];
           dp[0][0] = true;
           for(int i = 1 ; i < n ; i++) {
        	   if(a[i] == a[i - 1]) {
        		   dp[i][0] = dp[i][1] = true;
        	   }
        	   else {
        		   dp[i][0] = dp[i - 1][1];
        		   dp[i][1] = dp[i - 1][0];
        	   }
           }
           if(a[0] != a[n - 1]) {
        	   dp[n - 1][0] = false; 
           }
           int idx = 0;
           int ans[] = new int [n + 1];
           Arrays.fill(ans, -1);
           for(int i = n - 1 ; i >= 0; i--) {
        	   if(dp[i][0] ^ dp[i][1] == true) {
        		   idx = i;
        		   ans[idx] = (dp[i][0] == true)?0:1;
        	   }
           }
           if(ans[n - 1] == -1) {
        	   ans[ n - 1] = 0;
           }
           for(int i = n - 2 ; i >= 0 ; i --) {
        	   if(ans [i] == -1) {
        		   if(a[i] == a[ i + 1]) {
        			   ans[i] = ans[i + 1];
        		   }
        		   else
        			   ans[i] = ans[i + 1] ^ 1;
        	   }
           }
           chk = true;
           for(int i = 1 ; i < n - 1; i++) {
        	   if(a[i] != a[i - 1] && ans[i] == ans[i - 1]) {
        		   chk = false;
        	   }
           }
           if(a[0] != a[n - 1] && ans[0] == ans[n - 1]) {
    		   chk = false;
    	   }
           if(chk) {
        	   pw.println(2);
        	   for(int i = 0 ; i < n ; i++)
        		   pw.print((ans[i] + 1)+" ");
        	   continue outer;
           }
           
           pw.println(3);
           for(int i = 0 ; i < n - 1 ; i++) {
        	   pw.print((i % 2  + 1)+" ");
           }
           pw.print(3+" ");
        }
        pw.flush(); 
        pw.close();
    }
    public static void main(String[] args) throws Exception {
        
        
        new Thread(null,new Runnable() {
            public void run() {
                  try {
					new Main().solve();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
            }  
        },"1",1<<26).start();
        
        
    }
   
    static void debug(Object... o) {
        System.out.println(Arrays.deepToString(o));
        }
        
        static class InputReader 
        {
        private final InputStream stream;
        private final byte[] buf = new byte[8192];
        private int curChar, snumChars;
        private SpaceCharFilter filter;
 
        public InputReader(InputStream stream) 
        {
            this.stream = stream;
        }
        public int snext() 
        {
            if (snumChars == -1)
                throw new InputMismatchException();
            if (curChar >= snumChars) 
            {
                curChar = 0;
                try 
                {
                    snumChars = stream.read(buf);
                } 
                catch (IOException e) 
                {
                    throw new InputMismatchException();
                }
                if (snumChars <= 0)
                    return -1;
            }
            return buf[curChar++];
        }
 
        public int nextInt() 
        {
            int c = snext();
            while (isSpaceChar(c)) 
            {
                c = snext();
            }
            int sgn = 1;
            if (c == '-')
            {
                sgn = -1;
                c = snext();
            }
            int res = 0;
            do 
            {
                if (c < '0' || c > '9')
                    throw new InputMismatchException();
                res *= 10;
                res += c - '0';
                c = snext();
            } while (!isSpaceChar(c));
            return res * sgn;
        }
 
        public long nextLong()
        {
            int c = snext();
            while (isSpaceChar(c)) 
            {
                c = snext();
            }
            int sgn = 1;
            if (c == '-') 
            {
                sgn = -1;
                c = snext();
            }
            long res = 0;
            do 
            {
                if (c < '0' || c > '9')
                    throw new InputMismatchException();
                res *= 10;
                res += c - '0';
                c = snext();
            } while (!isSpaceChar(c));
            return res * sgn;
        }
 
        public int[] nextIntArray(int n) 
        {
            int a[] = new int[n];
            for (int i = 0; i < n; i++) 
            {
                a[i] = nextInt();
            }
            return a;
        }
 
        public String readString()
        {
            int c = snext();
            while (isSpaceChar(c)) 
            {
                c = snext();
            }
            StringBuilder res = new StringBuilder();
            do 
            {
                res.appendCodePoint(c);
                c = snext();
            } while (!isSpaceChar(c));
            return res.toString();
        }
 
        public String nextLine() 
        {
            int c = snext();
            while (isSpaceChar(c))
                c = snext();
            StringBuilder res = new StringBuilder();
            do 
            {
                res.appendCodePoint(c);
                c = snext();
            } while (!isEndOfLine(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;
        }
 
        private boolean isEndOfLine(int c) 
        {
            return c == '\n' || c == '\r' || c == -1;
        }
 
        public interface SpaceCharFilter
        {
            public boolean isSpaceChar(int ch);
        }
    }
        public static long mod = 1000000007;
        public static int d;
        public static int p;
        public static int q;
        public void extended(int a,int b) {
            if(b==0) {
                d=a;
                p=1;
                q=0;
            }
            else
            {
                extended(b,a%b);
                int temp=p;
                p=q;
                q=temp-(a/b)*q;
            }
        }
       
        
        public static long binaryExponentiation(long x,long n)
        {
            long result=1;
            while(n>0)
            {
                if(n % 2 ==1)
                    result=result * x;
                x=x*x;
                n=n/2;
            }
            return result;
        }
        
        public static long[] shuffle(long[] a,Random gen)
        {
            int n = a.length;
            for(int i=0;i<n;i++)
            {
                int ind = gen.nextInt(n-i)+i;
                long temp = a[ind];
                a[ind] = a[i];
                a[i] = temp;
            }
            return a;
        }
        
        public static void swap(int a, int b){
            int temp = a;
            a = b;
            b = temp;
        }
        
        public static HashSet<Integer> primeFactorization(int n)
        {
            HashSet<Integer> a =new HashSet<Integer>();
            for(int i=2;i*i<=n;i++)
            {
                while(n%i==0)
                {
                    a.add(i);
                    n/=i;
                }
            }
            if(n!=1)
                a.add(n);
            return a;
        }
        
        public static void sieve(boolean[] isPrime,int n)
        {
            for(int i=1;i<n;i++)
                isPrime[i] = true;
            
            isPrime[0] = false;
            isPrime[1] = false;
            
            for(int i=2;i*i<n;i++)
            {
                if(isPrime[i] == true)
                {
                    for(int j=(2*i);j<n;j+=i)
                        isPrime[j] = false;
                }
            }
        }
        
        public static long GCD(long n,long m)
        {
            if(m==0)
                return n;
            else
                return GCD(m,n%m);
        }
        public static long LCM (long a,long b) {
            return ((a*b)/(GCD(a,b)));
        }
        
        static class pair implements Comparable<pair>
        {
            Integer x , y ;
            
            pair(int l, int w )
            {
                this.x=l;
                this.y=w;
            }

           
            public int compareTo(pair o) {
                int result = x.compareTo(o.x);
                if(result==0)
                    result = y.compareTo(o.y);
                
                return result;
            }  
            
            public String toString()
            {
                return x+" "+y;
            }
            
            public boolean equals(Object o)
            {
                if (o instanceof pair)
                {
                    pair p = (pair)o;
                    return p.x == x && p.y == y ;
                }
                return false;
            }
            public int hashCode()
            {
                return x.hashCode()*3 +  y.hashCode();
                
            }
        }
        public static int binaryExponentiation(int x,int n)
        {
            int result=1;
            while(n>0)
            {
                if(n % 2 ==1)
                    result=result * x;
                x=x*x;
                n=n/2;
            }
            return result;
        }
        
       
        
        public static int modularExponentiation(int x,int n,int M)
        {
            int result=1;
            while(n>0)
            {
                if(n % 2 ==1)
                    result=(result * x)%M;
                x=(x%M*x)%M;
                n=n/2;
            }
            return result;
        }
        
        public static long modularExponentiation(long x,long n,long M)
        {
            long result=1;
            while(n>0)
            {
                if(n % 2 ==1)
                    result=(result%M * x%M)%M;
                x=(x%M * x%M)%M;
                n=n/2;
            }
            return result;
        }
        
        public static long modInverse(int A,int M)
        {
            return modularExponentiation(A,M-2,M);
        }
        
        public static long modInverse(long A,long M)
        {
            return modularExponentiation(A,M-2,M);
        }
        
       
        
                    
         
}

class Segment{ 
	int seg[]; 
	int lazy[];
    Segment (int n){
		seg=new int[4*n];
		lazy=new int[4*n];
	}
    public void build(int node,int start,int end) {
    	if(start==end) {
    		return ;
    	}
    	int mid=(start+end)/2;
    	build(2*node+1,start,mid);
    	build(2*node+2,mid+1,end);
    	seg[node]=seg[2*node+1]+seg[2*node+2];
    }
    public void update(int node,int start,int end,int id,int val) {
    	if(start==end) {
    		seg[node]=1;
    		return;
    	}
    	int mid=(start+end)/2;
    	if(id>=start && id<=mid) {
    		update(2*node+1,start,mid,id,val);
    	}
    	else
    		update(2*node+2,mid+1,end,id,val);
    	seg[node]=seg[2*node+1]+seg[2*node+2];
    }
    public int query(int node,int start,int end,int l,int r) {
    	if(l>end || r<start)
    		return 0;
    	if(start>=l && end<=r)
    		return seg[node];
    	
    	int  mid=(start+end)/2;
    	return (query(2*node+1,start,mid,l,r)+query(2*node+2,mid+1,end,l,r));
    }
    
    
}