ybbby..tt..ybbby
.yby........yby.
..y...g..g...y..
...o........o...
....gt....tg....
................
...o........o...
.......yy.......
................
...o........o...
................
....yyy..yyy....
...o........o...
................
....o......o....
.......yy.......
....o......o....
................
..oooooooooooo..
..rrrrrrrrrrrr..