input = $<.read.split.map(&:to_i)
ans = []
Q = input.shift
Q.times do
	v, x, fo, fi, q, r = input.shift(6)
	up = (fi - fo) * r
	down = -fo * (q - r)
	if x + up > v or up + down > 0
		ans << "Overflow"
	elsif up + down < 0
		ans << "Zero"
	else
		ans << "Safe"
	end
end

puts ans