"A": 1,

  "B": 10,

  "C": 100,

  "D": 1000

}

​

function setup() {

  createCanvas(1, 1);

  noLoop();

}

​

function draw() {

}

​

​

let input = `#############

#...........#

###A#D#B#D###

  #B#C#A#C#

  #########`;

​

input = `#############

#...........#

###B#C#B#D###

  #A#D#C#A#

  #########`;