Air Block = 0 Grass = 1 Dirt = 2 Smooth Stone = 3 Cobblestone = 4 Bedrock = 5 Coal Ore = 6 Iron Ore = 7 Diamond Ore = 8 Sand = 9 Unknown Character = error
This was very simple to make. Here is my example seed for you to try out: 000111100000000111222211110000222222222221111222222332222222223233333222322333377333322338335373333353388553335335335553555555555555555 (Seeds can only be 135 characters and less, anymore and it breaks.)