You are given n blocks, each of them is of the form [color_1|value|color_2], where the block can also be flipped to get [color_2|value|color_1]. 

A sequence of blocks is called valid if the touching endpoints of neighboring blocks have the same color. For example, the sequence of three blocks A, B and C is valid if the left color of the B is the same as the right color of the A and the right color of the B is the same as the left color of C.

The value of the sequence is defined as the sum of the values of the blocks in this sequence.

Find the maximum possible value of the valid sequence that can be constructed from the subset of the given blocks. The blocks from the subset can be reordered and flipped if necessary. Each block can be used at most once in the sequence.

Input

The first line of input contains a single integer n (1 ≤ n ≤ 100) — the number of given blocks.

Each of the following n lines describes corresponding block and consists of color_{1,i}, value_i and color_{2,i} (1 ≤ color_{1,i}, color_{2,i} ≤ 4, 1 ≤ value_i ≤ 100 000).

Output

Print exactly one integer — the maximum total value of the subset of blocks, which makes a valid sequence.

Examples

Input

6
2 1 4
1 2 4
3 4 4
2 8 3
3 16 3
1 32 2


Output

63

Input

7
1 100000 1
1 100000 2
1 100000 2
4 50000 3
3 50000 4
4 50000 4
3 50000 3


Output

300000

Input

4
1 1000 1
2 500 2
3 250 3
4 125 4


Output

1000

Note

In the first example, it is possible to form a valid sequence from all blocks.

One of the valid sequences is the following:

[4|2|1] [1|32|2] [2|8|3] [3|16|3] [3|4|4] [4|1|2]

The first block from the input ([2|1|4] → [4|1|2]) and second ([1|2|4] → [4|2|1]) are flipped.

In the second example, the optimal answers can be formed from the first three blocks as in the following (the second or the third block from the input is flipped):

[2|100000|1] [1|100000|1] [1|100000|2]

In the third example, it is not possible to form a valid sequence of two or more blocks, so the answer is a sequence consisting only of the first block since it is the block with the largest value.
import java.util.*;
import java.io.*;
/*
 * Heart beats fast
 * 		Colors and promises
 * 			How to be brave
 * 				How can I love when I am afraid...
 */
public class Main
{
	public static void main(String[]args) throws Exception
	{
		int n=ni();
		vector[][]type=new vector[5][5];
		int odd=0;
		int[]vals=new int[5];
		int values[][]=new int[n][];
		for(int i=0; i<n; i++)
		{
			values[i]=nia(3);
			vals[values[i][0]]++;
			vals[values[i][2]]++;
		}
		for(int i=1; i<=4; i++)
			if(vals[i]%2!=0)
				odd++;
		if(odd==0||odd==2)
		{
			for(int i=1; i<=4; i++)
				for(int j=1; j<=4; j++)
					type[i][j]=new vector();
			for(int i=0; i<n; i++)
			{
				int u=values[i][0],val=values[i][1],v=values[i][2];
				type[max(u,v)][min(u,v)].add(val);
			}
			System.out.println(solver(type));
		}
		else
		{
			long ans=0;
			for(int j=0; j<n; j++)
			{
			    if(values[j][0]!=values[j][2])
			    {
				for(int i=1; i<=4; i++)
					for(int k=1; k<=4; k++)
						type[i][k]=new vector();
				for(int i=0; i<n; i++)
					if(i!=j)
					{
						int u=values[i][0],val=values[i][1],v=values[i][2];
						type[max(u,v)][min(u,v)].add(val);
					}
				ans=max(ans,solver(type));
			    }
			}
			System.out.println(ans);
		}
	}
	static vector[]gra;
	static int[]par;
	static long solver(vector[][]a)
	{
		par=new int[5];
		gra=new vector[5];
		for(int i=1; i<=4; i++)
			gra[i]=new vector();
		for(int i=1; i<=4; i++)
			for(int j=1; j<=i; j++)
			{
				if(a[i][j].size!=0)
				{
					gra[i].add(j);
					gra[j].add(i);
				}
			}
		for(int i=1; i<=4; i++)
			dfs(i,i);
		long[]vals=new long[5];
		for(int i=1; i<=4; i++)
			for(int j=1; j<=4; j++)
				if(par[j]==i)
					for(int k=1; k<=4; k++)
						for(int l:a[j][k])
							vals[i]+=l;
		return max(vals);
	}
	static void dfs(int pare,int at)
	{
		if(par[at]!=0)
			return;
		par[at]=pare;
		for(int i:gra[at])
			dfs(pare,i);
	}
	///////////////////////////////////////////
	///////////////////////////////////////////
	///template from here
//	static final int mod=998_244_353;
	static final int mod=1000_000_007;
	static final double eps=1e-7;
	static final long inf=1000_000_000_000_000_000L;
	static class pair
	{
		int a,b;
		pair(){}
		pair(int c,int d){a=c;b=d;}
		@Override
		public int hashCode()
		{
			return (a+" "+b).hashCode();
		}
		public boolean equals(Object c)
		{
			return (a==(((pair)c).a)&&b==(((pair)c).b));
		}
	}
	public static void sort(int[][]a)
	{
		Arrays.sort(a, new Comparator<int[]>()
				{
			public int compare(int[]a,int[]b)
			{
				if(a[0]>b[0])
					return 1;
				if(a[0]<b[0])
					return -1;
				return 0;
			}
				});
	}
	static interface combiner
	{
		public int combine(int a, int b);
	}
	static void pr(Object a){output.append(a+"\n");}
	static void pr(){output.append("\n");}
	static void p(Object a){output.append(a);}
	static void pra(int[]a){for(int i:a)output.append(i+" ");output.append("\n");}
	static void pra(long[]a){for(long i:a)output.append(i+" ");output.append("\n");}
	static void pra(String[]a){for(String i:a)output.append(i+" ");output.append("\n");}
	static void pra(double[]a){for(double i:a)output.append(i+" ");output.append("\n");}
	static void sop(Object a){System.out.println(a);}
	static void flush(){System.out.print(output);output=new StringBuilder();}
	static int ni(){return Integer.parseInt(in.next());}
	static long nl(){return Long.parseLong(in.next());}
	static String ns(){return in.next();}
	static double nd(){return Double.parseDouble(in.next());}
	static int[] nia(int n){int a[]=new int[n];for(int i=0; i<n; i++)a[i]=ni();return a;}
	static int[] pnia(int n){int a[]=new int[n+1];for(int i=1; i<=n; i++)a[i]=ni();return a;}
	static long[] nla(int n){long a[]=new long[n];for(int i=0; i<n; i++)a[i]=nl();return a;}
	static String[] nsa(int n){String a[]=new String[n];for(int i=0; i<n; i++)a[i]=ns();return a;}
	static double[] nda(int n){double a[]=new double[n];for(int i=0; i<n; i++)a[i]=nd();return a;}
	static Reader in=new Reader();
	static StringBuilder output=new StringBuilder();
	static Random rn=new Random();
	static void reverse(int[]a){for(int i=0; i<a.length/2; i++){a[i]^=a[a.length-i-1];a[a.length-i-1]^=a[i];a[i]^=a[a.length-i-1];}}
	static int log2n(long a)
	{
		int te=0;
		while(a>0)
		{
			a>>=1;
			++te;
		}
		return te;
	}
	static class vectorl implements Iterable<Long>
	{
		long a[];
		int size;
		vectorl(){a=new long[10];size=0;}
		vectorl(int n){a=new long[n];size=0;}
		public void add(long b){if(++size==a.length)a=Arrays.copyOf(a, 2*size);a[size-1]=b;}
		public void sort(){Arrays.sort(a, 0, size);}
		public void sort(int l, int r){Arrays.sort(a, l, r);}
		@Override
		public Iterator<Long> iterator() {
			Iterator<Long> hola=new Iterator<Long>()
					{
				int cur=0;
						@Override
						public boolean hasNext() {
							return cur<size;
						}
						@Override
						public Long next() {
							return a[cur++];
						}				
					};
			return hola;
		}
	}
	static class vector implements Iterable<Integer>
	{
		int a[],size;
		vector(){a=new int[10];size=0;}
		vector(int n){a=new int[n];size=0;}
		public void add(int b){if(++size==a.length)a=Arrays.copyOf(a, 2*size);a[size-1]=b;}
		public void sort(){Arrays.sort(a, 0, size);}
		public void sort(int l, int r){Arrays.sort(a, l, r);}
		@Override
		public Iterator<Integer> iterator() {
			Iterator<Integer> hola=new Iterator<Integer>()
					{
				int cur=0;
						@Override
						public boolean hasNext() {
							return cur<size;
						}
						@Override
						public Integer next() {
							return a[cur++];
						}				
					};
			return hola;
		}
	}
	static void exit(){System.out.print(output);System.exit(0);}
	static int min(int... a){int min=a[0];for(int i:a)min=Math.min(min, i);return min;}
	static int max(int... a){int max=a[0];for(int i:a)max=Math.max(max, i);return max;}	
	static int gcd(int... a){int gcd=a[0];for(int i:a)gcd=gcd(gcd, i);return gcd;}	
	static long min(long... a){long min=a[0];for(long i:a)min=Math.min(min, i);return min;}
	static long max(long... a){long max=a[0];for(long i:a)max=Math.max(max, i);return max;}	
	static long gcd(long... a){long gcd=a[0];for(long i:a)gcd=gcd(gcd, i);return gcd;}	
	static String pr(String a, long b){String c="";while(b>0){if(b%2==1)c=c.concat(a);a=a.concat(a);b>>=1;}return c;}
	static long powm(long a, long b, long mod2){long an=1;long c=a%mod2;while(b>0){if(b%2==1)an=(an*c)%mod2;c=(c*c)%mod2;b>>=1;}return an;}
	static long pow(long a, long b){long an=1;long c=a;while(b>0){if(b%2==1)an*=c;c*=c;b>>=1;}return an;}
	static int gcd(int a, int b){if(b==0)return a;return gcd(b, a%b);}
	static long gcd(long a, long b){if(b==0)return a;return gcd(b, a%b);}
	static class Reader{
        public BufferedReader reader;
        public StringTokenizer tokenizer;
        public Reader() {
            reader = new BufferedReader(new InputStreamReader(System.in));
            tokenizer = null;
        }
        public String next() {
            while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                try {
                    tokenizer = new StringTokenizer(reader.readLine());
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }
    }
} 