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

//----------HEADER----------
#include<bits/stdc++.h>
using namespace std;
//----------TEMPLATES----------
template<typename... T>
void see(T&... args) { ((cin >> args), ...);}
template<typename... T>
void put(T&&... args) { ((cout << args << " "), ...);cout<<'\n';}
#define error(args...) { string _s = #args; replace(_s.begin(), _s.end(), ',', ' '); stringstream _ss(_s); istream_iterator<string> _it(_ss); err(_it, args); }
void err(istream_iterator<string> it) {}
template<typename T, typename... Args>
void err(istream_iterator<string> it, T a, Args... args) {cerr << *it << "=" << a << ", "; err(++it, args...);}
//----------MACROS----------
#define int long long
#define pb push_back
#define F first
#define S second
#define ll long long
#define ull unsigned long long
#define ld long double
#define pii pair<int,int>
#define vi vector<int>
#define vii vector<pii>
#define vc vector
#define nl '\n'
#define E cerr<<'\n'
#define all(x) x.begin(),x.end()
#define rep(i,a,b) for (int i=a; i<b; ++i)
#define rev(i,a,b) for (int i=a; i>b; --i)
#define IOS ios_base::sync_with_stdio(false)
#define setpr(x) cout<<setprecision(x)<<fixed
#define sz size()
#define N 100005
//----------CONSTANTS----------
const ll inf = INT_MAX;
const ld ep = 0.0000001;
const ld pi = acos(-1.0);
const ll md = 1000000007;
//----------GLOBALS----------
set<pii> s,vis;
map<string, int> dp;
int x1,y1,x2,y2;

int rec(int x, int y){
	vis.insert({x,y});
	string k = to_string(x)+"|"+to_string(y);
	if (dp.find(k)!=dp.end()) return dp[k];
	if (x==x2 && y==y2) return 0;
	dp[k]=1e10;
	rep(i,-1,2){
		if (x+i<=0 || x+i>1e9) continue;
		rep(j,-1,2){
			if (!i && !j) continue;
			if (y+j<=0 || y+j>1e9) continue;
			string k1 = to_string(x+i)+"|"+to_string(y+j);
			if (dp.find(k1)!=dp.end()) dp[k] = min(dp[k], 1+ dp[k1]);
			if (vis.find({x+i,y+j})!=vis.end()) continue;
			if (s.find({x+i,y+j})!=s.end()){
				dp[k1] = rec(x+i,y+j);
				dp[k] = min(dp[k], 1+ dp[k1]);
			}
		}
	}
	return dp[k];
}
//----------SOLUTION----------
void solve(){
	see(x1,y1,x2,y2);
	int n; see(n);
	rep(i,0,n){
		int r,a,b; see(r,a,b);
		rep(i,a,b+1){
			s.insert({r,i});
		}
	}
	int ans=rec(x1,y1);
	if (ans<=1e9) cout<<ans;
	else cout<<-1; 
}	
//----------MAIN----------
signed main(){
	IOS;
	#ifndef ONLINE_JUDGE
    //freopen("input.txt", "r" , stdin);
    //freopen("output.txt", "w", stdout);
    #endif
	solve();
}