#include <iostream>
using namespace std;

#define NONE  0
#define OBJ   1
#define START 2
#define GOAL  3
#define DEAD  4

int board[22][22];
int sx,sy;
int gx,gy;

int wx[] = {0,0,1,-1};
int wy[] = {1,-1,0,0};

int calc(int x,int y,int depth){
  if(depth == 11) return -1;
  int dx,dy;
  int score = -1;
  for(int i=0;i<4;i++){
    dx = wx[i];
    dy = wy[i];    
    if(board[y+dy][x+dx] == OBJ) continue;
    int cx = x;
    int cy = y;
    bool you_die = false;
    while(true){
      cx = cx + dx;
      cy = cy + dy;
      if(board[cy][cx] == DEAD){
	you_die = true;
	break;
      }
      if(cy == gy && cx == gx) return depth;
      if(board[cy+dy][cx+dx] == OBJ) break;
    }
    if(you_die) continue;
    int ox,oy;
    ox = cx + dx;
    oy = cy + dy;
    board[oy][ox] = NONE;
    int result = calc(cx,cy,depth+1);
    board[oy][ox] = OBJ;
    if(result == -1){
      continue;
    }else if(score == -1){
      score = result;
    }else{
      score = min(score,result);
    }
  }
  return score;
}

int main(void){
  while(true){
    int w,h;
    cin >> w >> h;
    if(w == 0 && h == 0) break;
    for(int y=0;y<h+2;y++){
      for(int x=0;x<w+2;x++){
	board[y][x] = DEAD;
      }
    }
    
    for(int y=1;y<=h;y++){
      for(int x=1;x<=w;x++){
	int t;
	cin >> t;
	if(t == GOAL){
	  gx = x;
	  gy = y;
	  t = NONE;
	}else if(t == START){
	  sx = x;
	  sy = y;
	  t = NONE;
	}
	board[y][x] = t;
      }
    }
    int ans = calc(sx,sy,1);
    cout << ans<<endl;
    
  }
  return 0;
}