import math
ipt = input('请输入x1,y1,x2,y2,以逗号隔开:')
data = ipt.split(',')
data = [int(x) for x in data]
result = math.sqrt(
math.pow(
data[0] -
data[2],
2) +
math.pow(
data[1] -
data[3],
2))
print(data[0], ',', data[1], '与', data[2], ',', data[3], '之间的距离为:', result)