Ivan has an array consisting of n different integers. He decided to reorder all elements in increasing order. Ivan loves merge sort so he decided to represent his array with one or several increasing sequences which he then plans to merge into one sorted array.

Ivan represent his array with increasing sequences with help of the following algorithm.

While there is at least one unused number in array Ivan repeats the following procedure:

  * iterate through array from the left to the right; 
  * Ivan only looks at unused numbers on current iteration; 
  * if current number is the first unused number on this iteration or this number is greater than previous unused number on current iteration, then Ivan marks the number as used and writes it down. 



For example, if Ivan's array looks like [1, 3, 2, 5, 4] then he will perform two iterations. On first iteration Ivan will use and write numbers [1, 3, 5], and on second one — [2, 4].

Write a program which helps Ivan and finds representation of the given array with one or several increasing sequences in accordance with algorithm described above.

Input

The first line contains a single integer n (1 ≤ n ≤ 2·105) — the number of elements in Ivan's array.

The second line contains a sequence consisting of distinct integers a1, a2, ..., an (1 ≤ ai ≤ 109) — Ivan's array.

Output

Print representation of the given array in the form of one or more increasing sequences in accordance with the algorithm described above. Each sequence must be printed on a new line.

Examples

Input

5
1 3 2 5 4


Output

1 3 5 
2 4 


Input

4
4 3 2 1


Output

4 
3 
2 
1 


Input

4
10 30 50 101


Output

10 30 50 101 
    import java.util.*;
    import java.io.*;
    //import java.lang.*;

    public class ranjan{

        //public static Read cin;
        public static InputReader cin;
        public static PrintWriter cout;
        public static int[] visited;
        public static final long bil = (long)1e9+7;
        public static int fileread = 0; 
        
        public static void main(String ...arg) throws IOException
        {
            /*console writer*/
            cout = new PrintWriter(new BufferedOutputStream(System.out));
            /*Debug Reader*/
            //Scan cin =new Scan();clear
            
            if(fileread == 1)
            {
                try
                {
                //cin = new Read(new FileInputStream(new File("in3.txt")));
                cin = new InputReader(new FileInputStream(new File("in1.txt")));
                }
                catch (IOException error){}
            }
            else{
                //cin = new Read(System.in);
                cin = new InputReader(System.in);
            }

            //input
            int n = cin.nextInt();
            int[] a = new int[n];
            for(int i=0;i<n;i++) a[i] = cin.nextInt();

            int[] list = new int[n]; //array to store the current maximum
            ArrayList<Integer>[] ans = new ArrayList[n]; //to store various increasing lists


            for(int i=0;i<n;i++) ans[i] = new ArrayList<>();

            for(int i=0;i<n;i++){
                int ind = Arrays.binarySearch(list,a[i]);
                //the increasing numbers will belong to same index in list
                //instead of inserting a number just replace the current number with latest bigger one
                if(ind<0) //if number does not exist then it is the first number in series so insert it at requied index
                    ind = -1*ind-2;
                list[ind] = a[i];
                ans[ind].add(a[i]);
            }

            for(int i=n-1;i>=0;i--){
                if(ans[i].size() == 0) break;
                for(int x:ans[i])
                    cout.print(x+" ");
                cout.print("\n");
            }
            cout.print("\n");
            cout.close();
        }


        private static class Pair{
            public int a,b;
            public Pair(int a,int b)
            {
                this.a = a;
                this.b = b;
            }	
        }


        /*public static void seive(int size)
        {
            prime[0] = prime[1] = false;
            int p = 2;
            while(p*p<= size)
            {
                if(prime[p])
                {
                    for(int i=p*p;i<size;i += p)

                        prime[i] = false;
                }
                p++;
            }
        }*/


        public static <K, V> V getOrDefault(HashMap<K,V> map, K key, V defaultValue) {
            return map.containsKey(key) ? map.get(key) : defaultValue;
        }
        
        static void reverseArray(int intArray[], int size) 
        { 
            int i, temp; 
            for (i = 0; i < size / 2; i++) { 
                temp = intArray[i]; 
                intArray[i] = intArray[size - i - 1]; 
                intArray[size - i - 1] = temp; 
            }  
        } 

        public static long mod_pow(long x,long n,long mod) {
            long res=1;
            while(n>0) {
                if((n&1)==1)res=res*x%mod;
                x=x*x%mod;
                n>>=1;
            }
            return res;
        }
        public static int gcd(int n1, int n2) 
        {
            int r;
            while (n2 != 0) 
            {
                r = n1 % n2;
                n1 = n2;
                n2 = r;
            }
            return n1;
        }
    
        /*public static int lcm(int n1, int n2) 
        {
            int answer = (n1 * n2) / (gcd(n1, n2));
            return answer;
        }*/


        static class InputReader {
            final InputStream is;
            final byte[] buf = new byte[1024];
            int pos;
            int size;
    
            public InputReader(InputStream is) {
                this.is = is;
            }
    
            public int nextInt() {
                int c = read();
                while (isWhitespace(c))
                    c = read();
                int sign = 1;
                if (c == '-') {
                    sign = -1;
                    c = read();
                }
                int res = 0;
                do {
                    if (c < '0' || c > '9')
                        throw new InputMismatchException();
                    res = res * 10 + c - '0';
                    c = read();
                } while (!isWhitespace(c));
                return res * sign;
            }
    
            int read() {
                if (size == -1)
                    throw new InputMismatchException();
                if (pos >= size) {
                    pos = 0;
                    try {
                        size = is.read(buf);
                    } catch (IOException e) {
                        throw new InputMismatchException();
                    }
                    if (size <= 0)
                        return -1;
                }
                return buf[pos++] & 255;
            }
    
            static boolean isWhitespace(int c) {
                return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
            }
    
        }

}


    
class Read
{
    private BufferedReader br;
    private StringTokenizer st;

    public Read(InputStream is)
    { br = new BufferedReader(new InputStreamReader(is)); }

    String next()
    {
        while (st == null || !st.hasMoreElements())
        {
            try {st = new StringTokenizer(br.readLine());}
            catch(IOException e)
                {e.printStackTrace();}
        }
        return st.nextToken();
    }

    int nextInt()
    { return Integer.parseInt(next()); }

    long nextLong()
    { return Long.parseLong(next()); }

    double nextDouble()
    { return Double.parseDouble(next()); }

    String nextLine()
    {
        String str = "";
        try {str = br.readLine();}
        catch(IOException e)
            {e.printStackTrace();}
        return str;
    }
}

