为什么这个代码80分，测试点5是RE

from math import sqrt

l1 = input().split(' ')
l2 = input().split(' ')
l3 = input().split(' ')
x1, y1 = int(l1[0]), int(l1[1])
x2, y2 = int(l2[0]), int(l2[1])
x3, y3 = int(l3[0]), int(l3[1])

s1 = sqrt((x1 - x2) ** 2 + (y1 - y2) ** 2)
s2 = sqrt((x1 - x3) ** 2 + (y1 - y3) ** 2)
s3 = sqrt((x2 - x3) ** 2 + (y2 - y3) ** 2)

print(round(s1 + s2 + s3, 2))