from math import *
from tkinter import *

x, y, l, k = map(int, input().split())
root = Tk()
I1 = 0
J1 = 0
I2 = 500
J2 = 500
canv = Canvas(root, width = I2, height = J2, bg = 'lightblue')     
xt, yt = x, y + l
print(xt,yt)
canv.create_line(x, y, xt, yt, width = 0.5)

def tree(x, y, l, k):
    if k >= 1:
        alpha = pi / 6
        for i in range(k):
            x1 = x + (0.4 * l) * sin(alpha * (i))
            y1 = y - (0.4 * l) * cos(alpha * (i))
            x2 = x - (0.4 * l) * sin(alpha * (i))
            y2 = y - (0.4 * l) * cos(alpha * (i))
            canv.create_line(x, y, x1, y1, width = 0.5)
            canv.create_line(x, y, x2, y2, width = 0.5)
            print(x1,y1,x2,y2)
            tree(x1, y1, 0.4 * l, k - 1)
            tree(x2, y2, 0.4 * l, k - 1)        
        
        
        
tree(x, y, l, k)
    
canv.pack()
root.mainloop()