local dig, shft, dir = ...

function fw()
	turtle.dig()
	turtle.forward()

top = false
for i=1,dig do
	fw()
	turtle.turnLeft()
	turtle.dig()
	turtle.digUp()
	turtle.up()
	turtle.dig()
	turtle.turnRight()
	turtle.turnRight()
	turtle.dig()
	turtle.down()
	turtle.dig()
	turtle.turnLeft()
end

turtle.turnRight()
turtle.turnRight()
for i=1,dig do
	fw()
end
if dir=="right" then
	turtle.turnRight()
else
	turtle.turnLeft()
end
for i=1,shft do
	fw()
end


if dir=="right" then
	turtle.turnRight()
else
	turtle.turnLeft()
end