#We need the math library for this
import math
x1, y1=int(input("Please enter a number: ")), int(input("Please enter a number: "))
x2, y2=int(input("Please enter a number: ")), int(input("Please enter a number: "))
distance = math.sqrt((x2-x1)**2 +(y2-y1)**2)
print("The distance is", distance)