#include <bits/stdc++.h>
#define For(i, a, b) for(int i = (a); i <= (b);i++)
#define Rof(i, a, b) for(int i = (a); i >= (b);i--)
using namespace std;


int x[5];
int y[5];

int rk[3];

bool cmp (int a, int b)
{
    return x[a] < x[b];
}
int main()
{
    For(i, 1, 3) scanf("%d%d", &x[i], &y[i]);
    int ymin = 1000000009, ymax = -1000000009;
    int xmin = 1000000009, xmax = -1000000009;
    For(i, 1, 3) rk[i] = i, ymin = min(ymin, y[i]), ymax = max(ymax, y[i]), xmin = min(xmin, x[i]), xmax = max(xmax, x[i]);
    sort(rk + 1, rk + 1 + 3, cmp);
    if(x[1] == x[2] && x[2] == x[3]) {
        printf("1\n");
        printf("%d %d %d %d\n", x[1] ,ymin, x[1], ymax);
    }
    else if(y[1] == y[2] && y[2] == y[3]) {
        printf("1\n");
        printf("%d %d %d %d\n", xmin, y[1], xmax, y[1]);
    }
    else if(x[1] == x[2]) {
        printf("2\n");
        printf("%d %d %d %d\n", x[1], ymin, x[1], ymax);
        printf("%d %d %d %d\n", x[1], y[3], x[3], y[3]);
    }
    else if(x[2] == x[3]) {
        printf("2\n");
        printf("%d %d %d %d\n", x[2], ymin, x[2], ymax);
        printf("%d %d %d %d\n", x[2], y[1], x[1], y[1]);        
    }
    else if(y[1] == y[2]) {
        printf("2\n");
        printf("%d %d %d %d\n", xmin, y[1], xmax, y[1]);
        printf("%d %d %d %d\n", x[3], y[3], x[3], y[1]);
    }
    else if(y[2] == y[3]) {
        printf("2\n");
        printf("%d %d %d %d\n", xmin, y[2], xmax, y[2]);
        printf("%d %d %d %d\n", x[1], y[1], x[1], y[3]);
    }
    else {
        printf("3\n");
        printf("%d %d %d %d\n", x[rk[2]], ymin, x[rk[2]], ymax);
        printf("%d %d %d %d\n", x[rk[1]], y[rk[1]], x[rk[2]], y[rk[1]]);
        printf("%d %d %d %d\n", x[rk[3]], y[rk[3]], x[rk[2]], y[rk[3]]);
    }
    return 0;
}