630 B | 630 chars
import sys
from math import sqrt, pi, sin, factorial, ceil, floor
from datetime import datetime, timedelta
BLANK = " "
# inp = input
inp = lambda : sys.stdin.readline()[:-1].strip()
mii = lambda x = BLANK : [*map(int,inp().split(x))]
mfi = lambda x = BLANK : [*map(float,inp().split(x))]
ii = lambda : int(inp())
fi = lambda : float(inp())
p = print
def solve():
A = input()
a = mfi()
B = input()
b = mfi()
d = (a[0] - b[0]) ** 2 + (a[1] - b[1]) ** 2 + (a[2] - b[2]) ** 2
d = sqrt(d)
p(f"{A} to {B}: {d:.2f}")
if __name__ == "__main__":
tc = ii()
for t in range(1, tc+1):
ret = solve()