#include <stdio.h>
#include "leelib.h"

int assignmentMatrix[13][13] = {
    {-1, -1, -1, -1, 0, -1, 0, -1, 0, -1, -1, -1, -1},
    {-1, -1, -1, -1, 0, -1, 0, -1, 0, -1, -1, -1, -1},
    {-1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, -1},
    {-1, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, -1},
    {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
    {-1, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, -1},
    {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
    {-1, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, -1},
    {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
    {-1, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, -1},
    {-1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, -1},
    {-1, -1, -1, -1, 0, -1, 0, -1, 0, -1, -1, -1, -1},
    {-1, -1, -1, -1, 0, -1, 0, -1, 0, -1, -1, -1, -1},
};

typedef struct cell {
    int x;
    int y;

} cell;

int isInBound(cell *c);
int isValidCrossing(cell *c);

int main(void) {
    /* read the nr of blocked stations and the stations*/

    int nrOfBlock = 0;
    scanf("%d", &nrOfBlock);
    
    for (int i = 0; i < nrOfBlock; i++) {
        int x, y;
        readEdge(&x, &y);
        assignmentMatrix[x][y] = -1;
    }

    /* read the starting and end station*/
    cell startCell, targetCell,currentCell;

    readStation(&startCell.x, &startCell.y);
    readStation(&targetCell.x, &targetCell.y);
    currentCell=startCell;

    /* the **algorithm**, expand*/
    int v = 1;
    assignmentMatrix[targetCell.x][targetCell.y] = v;
    while (assignmentMatrix[startCell.x][startCell.y] == 0) {
        for (int i = 0; i < 13; i++) {
            for (int j = 0; j < 13; j++) {
                if (assignmentMatrix[i][j] == v) {
                    if (i!=12) {
                        if (assignmentMatrix[i+1][j] == 0) {
                            assignmentMatrix[i+1][j] = v+1;
                        }
                    }
                    if (i!=0) {
                        if (assignmentMatrix[i-1][j] == 0) {
                            assignmentMatrix[i-1][j] = v+1;
                        }
                    }
                    if (j!=12) {
                        if (assignmentMatrix[i][j+1] == 0) {
                            assignmentMatrix[i][j+1] = v+1;
                        }
                    }
                    if (j!=0) {
                        if (assignmentMatrix[i][j-1] == 0) {
                            assignmentMatrix[i][j-1] = v+1;
                        }
                    }
                }
            }
        }
        v+=1;
    }

    /* the **algorithm**, trace*/

    while (currentCell.x != targetCell.x || currentCell.y != targetCell.y) {
        const int neighbours[4][2]={{1,0},{0,1},{0,-1},{-1,0}};
        for (int i = 0; i < 4; i++) {
            cell neighbourCell;
            neighbourCell.x = currentCell.x + neighbours[i][0];
            neighbourCell.y = currentCell.y + neighbours[i][1];
            if (isInBound(&neighbourCell) && assignmentMatrix[neighbourCell.x][neighbourCell.y] != -1 && assignmentMatrix[neighbourCell.x][neighbourCell.y] < assignmentMatrix[currentCell.x][currentCell.y] ) {
                currentCell=neighbourCell;
                break;
            }
        }
        if ( isValidCrossing(&currentCell)) {
            printCrossingName(currentCell.x, currentCell.y);
        }
    }
        return 0;
    }

int isInBound(cell *c) {
    if (c -> x >= 0 && c -> x <= 13 && c -> y >= 0 && c -> y <= 13) {
        return 1;
    }
    return 0;
}
int isValidCrossing(cell *c) {
    if (c -> x > 0 && c -> x <12 && c -> y > 0 && c -> y < 12) {
        return 1;
    }
    return 0;
}