pub fn get_paths(
  grid: Dict(#(Int, Int), Int),
  position: #(Int, Int),
  current_path: List(#(Int, Int)),
  paths: List(List(#(Int, Int))),
) -> List(List(#(Int, Int)))

pub fn get_start_positions(
  grid: Dict(#(Int, Int), Int),
) -> List(#(Int, Int))

pub fn get_surrounding_entries(
  grid: Dict(#(Int, Int), Int),
  position: #(Int, Int),
) -> List(#(Int, Int))

pub fn get_trailheads(
  grid: Dict(#(Int, Int), Int),
) -> List(#(Int, Int))

pub fn get_unique_endpoints(
  paths: List(List(#(Int, Int))),
) -> List(#(Int, Int))

pub fn grid_to_string(
  grid: Dict(#(Int, Int), Int),
) -> Dict(#(Int, Int), String)

pub fn main() -> Nil