x1,y1,x2,y2 = map(int, input().split())
ox = (x1 + x2) / 2
oy = (y1 + y2) / 2
px = (x1 - ox)
py = (y1 - oy)
x3 = int(ox - py)
y3 = int(oy + px)
x4 = int(ox + py)
y4 = int(oy - px)
print(x3, y3)
print(x4, y4)
