sghrj

from turtle import*
from random import*
n=int(input())
a=int(input())
for i in range(4):
    pu()
    goto(0,0)
    right(randint(0,360))
    backward(a//2)
    rt(90)
    backward(a/2)
    lt(90)
    pd()
    for i in range (4):
        fd(a)
        rt(90)