#OC traveler

local r = require("robot")

-- functions part
function move(dir, times)
  if dir == "f" then
    for i=1,times do
      r.forward()
    end
  elseif dir == "b" then
    for i=1,times do
      r.back()
    end
  elseif dir == "u" then
    for i=1,times do
      r.up()
    end
  elseif dir == "d" then
    for i=1,times do
      r.down()
    end
  elseif dir == "l" then
    r.turnLeft()
  elseif dir == "r" then
    r.turnRight()
  elseif dir == nil then
    print("You added ',' after the final move.")
  else
    print("Error in input!")
    os.exit()
  end
end

function convert(inp)
  t = {}
  c = 1
  for s, e in (inp..","):gmatch("(.)(.?.?),") do
    t[c] = {}
    t[c][1] = s
    t[c][2] = e
    c = c + 1
  end
  return t
end

function parse(inp)
  for i=1,#inp do
    move(inp[i][1], inp[i][2])
  end
end

-- work part
path = "f1,d2,f1,r,f10,l,f3,d3,l,f3,d3,r,f5,r"
parse(convert(path))