1 1 1 2
5
1000000000 1 10000
19920401 1188 5566
1000000000 1 10000
1 1 10000
5 100 200
 6 15 7 15
9
6 15 15
7 14 14
6 15 15
9 14 14
7 14 16
6 15 15
6 15 15
7 14 14
8 15 15
 1 1 1000000000 2
5
1000000000 1 10000
19920401 1188 5566
1000000000 1 10000
1 1 10000
5 100 200
 89 29 88 30
16
87 31 31
14 95 95
98 88 89
96 88 88
14 97 97
13 97 98
100 88 88
88 32 32
99 88 89
90 29 29
87 31 31
15 94 96
89 29 29
88 32 32
97 89 89
88 29 30
 30 14 39 19
31
35 7 11
37 11 12
32 13 13
37 5 6
46 13 13
37 14 14
31 13 13
43 13 19
45 15 19
46 13 13
32 17 17
41 14 19
30 14 14
43 13 17
34 16 18
44 11 19
38 13 13
40 12 20
37 16 18
46 16 18
34 10 14
36 9 10
36 15 19
38 15 19
42 13 19
33 14 15
35 15 19
33 17 18
39 12 20
36 5 7
45 12 12
 9 8 7 8
9
10 6 6
10 6 6
7 7 8
9 5 6
8 9 9
9 5 5
9 8 8
8 5 6
9 10 10
 2 1 1 1
2
1 1 2
2 1 2
 13 16 20 10
18
13 16 16
20 10 10
19 10 10
12 15 15
20 10 10
18 11 11
19 10 10
19 10 10
20 10 10
19 10 10
20 10 10
20 10 10
19 10 10
18 11 11
13 16 16
12 15 15
19 10 10
19 10 10

1
 1
 -1
 1
 9
 2
 1
 -1

import java.io.*;
import java.util.*;

public class Test
{
    static PrintWriter pw = new PrintWriter(System.out);

    static TreeMap<Integer , A> m = new TreeMap();
    static TreeMap<Integer , A> v = new TreeMap();
    static TreeMap<Integer , B> dis = new TreeMap();
    
    static class p{
    	int x , y;
    	p(int a , int b){
    		x =a; y = b;
    	}
    }
    
    static class A
    {
    	TreeSet<Integer> st  = new TreeSet();
  
    	void add(int x) {
    		st.add(x);
    	}
    	
    	boolean get(int x) {
    		return st.contains(x);
    	}
    }
    
    static class B
    {
    	TreeMap<Integer , Long> st  = new TreeMap();
    	B(int x , long y)
    	{
    		st.put(x , y);
    	}
    	
    	void add(int x , long y) {
    		st.put(x, y);
    	}
    	

    	long get(int x)
    	{
    		return st.get(x);
    	}
    }
    
    static void bfs(int i , int j)
    {
    	Queue<p> q = new LinkedList();
    	q.add(new p(i,j));
    	v.get(i).add(j);
    	
    	while(!q.isEmpty())
    	{
    		p p = q.poll();
    		
    		
    		int[] x = {0 , 0 , -1 , -1 , -1 , 1 , 1 ,1 };
    		int[] y = {-1 , 1 , -1 , 0 , 1 , -1 , 0 , 1};
    		
    		for(int z = 0 ; z<8 ; z++)
    		{
    			int a = p.x + x[z];
    			int b = p.y + y[z];
    
    			if(a < 1 || a > (int)1e9 || b<1 || b > (int)1e9 || !m.containsKey(a) || !m.get(a).get(b)  || v.get(a).get(b))continue;
    			
    			
    			long f = dis.get(p.x).get(p.y);
    			v.get(a).add(b);
    			if(dis.containsKey(a))dis.get(a).add(b, f  + 1);
    			else {
    				dis.put(a , new B(b, f  + 1));
    			}
    			q.add(new p(a , b));
    		}
    		
    	}
    }
    
    public static void main(String[] args)throws Exception
    {
        Reader.init(System.in);
       
        int x1 = Reader.nextInt();
        int y1 = Reader.nextInt();
        int x2 = Reader.nextInt();
        int y2 = Reader.nextInt();
        

        dis.put(x1 , new B(y1 , 0));
        
        int n = Reader.nextInt();
        for(int i = 0 ; i<n ; i++)
        {
        	int r = Reader.nextInt();
        	if(!v.containsKey(r))v.put(r , new A());
        	if(!m.containsKey(r))m.put(r , new A());
        	
        	int a = Reader.nextInt();
        	int b = Reader.nextInt();
        	
        	for(int j = a ; j<=b ; j++)
        	{
        		m.get(r).add(j);
        		
        	}
        	
        }
        
        bfs(x1 , y1);
        
        if(v.get(x2).get(y2))
        	pw.print(dis.get(x2).get(y2));
        else pw.print(-1);
        
        pw.close();
   
    }


}



class Reader {

    static BufferedReader reader;
    static StringTokenizer tokenizer;

    public static int pars(String x) {
        int num = 0;
        int i = 0;
        if (x.charAt(0) == '-') {
            i = 1;
        }
        for (; i < x.length(); i++) {
            num = num * 10 + (x.charAt(i) - '0');
        }

        if (x.charAt(0) == '-') {
            return -num;
        }

        return num;
    }

    static void init(InputStream input) {
        reader = new BufferedReader(
                new InputStreamReader(input));
        tokenizer = new StringTokenizer("");
    }

    static void init(FileReader input) {
        reader = new BufferedReader(input);
        tokenizer = new StringTokenizer("");
    }

    static String next() throws IOException {
        while (!tokenizer.hasMoreTokens()) {
            tokenizer = new StringTokenizer(
                    reader.readLine());
        }
        return tokenizer.nextToken();
    }

    static int nextInt() throws IOException {
        return pars(next());
    }

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

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

}