#![allow(non_snake_case, unused_imports, unused_must_use)]
use std::io::{self, prelude::*, BufWriter, StdinLock, StdoutLock};
use std::str;

fn main() {
    let (stdin, stdout) = (io::stdin(), io::stdout());
    let mut scan = Scanner::new(stdin.lock());
    let mut out = io::BufWriter::new(stdout.lock());

    macro_rules! input {
        ($T: ty) => {
            scan.token::<$T>()
        };
        ($T: ty, $N: expr) => {
            (0..$N).map(|_| scan.token::<$T>()).collect::<Vec<_>>()
        };
    }

    let t = input!(usize);

    for _ in 0..t {
        solve(&mut scan, &mut out);
    }
}

fn solve(scan: &mut Scanner<StdinLock>, out: &mut BufWriter<StdoutLock>) {
    macro_rules! input {
        ($T: ty) => {
            scan.token::<$T>()
        };
        ($T: ty, $N: expr) => {
            (0..$N).map(|_| scan.token::<$T>()).collect::<Vec<_>>()
        };
    }

    let V = input!(i128);
    let X = input!(i128);
    let F0 = input!(i128);
    let Fi = input!(i128);
    let Q = input!(i128);
    let R = input!(i128);

    let mut now = X;
    let rep_start = now;

    // R
    now += (Fi - F0) * R;

    if now <= 0 {
        writeln!(out, "Zero");
        return;
    } else if now >= V {
        writeln!(out, "Overflow");
        return;
    }

    // Q
    now -= (Q - R) * F0;

    if now <= 0 {
        writeln!(out, "Zero");
        return;
    } else if now >= V {
        writeln!(out, "Overflow");
        return;
    }

    let diff = now - rep_start;

    if diff < 0 {
        writeln!(out, "Zero");
    } else if diff == 0 {
        writeln!(out, "Safe");
    } else {
        writeln!(out, "Overflow");
    }
}

struct Scanner<R> {
    reader: R,
    buf_str: Vec<u8>,
    buf_iter: str::SplitWhitespace<'static>,
}
impl<R: BufRead> Scanner<R> {
    fn new(reader: R) -> Self {
        Self {
            reader,
            buf_str: vec![],
            buf_iter: "".split_whitespace(),
        }
    }
    fn token<T: str::FromStr>(&mut self) -> T {
        loop {
            if let Some(token) = self.buf_iter.next() {
                return token.parse().ok().expect("Failed parse");
            }
            self.buf_str.clear();
            self.reader
                .read_until(b'\n', &mut self.buf_str)
                .expect("Failed read");
            self.buf_iter = unsafe {
                let slice = str::from_utf8_unchecked(&self.buf_str);
                std::mem::transmute(slice.split_whitespace())
            }
        }
    }
}