q = []#存留个参数
w = []#存三个边长

for i in range(3):#存参数
    a,b = map(int,input().split())
    q.append(a)
    q.append(b)

def juli(x1,y1,x2,y2):#算边长
    dic = pow(((x2-x1)**2+(y2-y1)**2),0.5)
    w.append(dic)

def zhou(a,b,c):#算周长
    print('%.2f'%(a+b+c))

juli(q[0],q[1],q[2],q[3])
juli(q[0],q[1],q[4],q[5])
juli(q[2],q[3],q[4],q[5])
zhou(w[0],w[1],w[2])