fn main() {
    let mut xx = String::new();
    std::io::stdin().read_line(&mut xx).ok();
    let xx: Vec<u64> = xx.split_whitespace().flat_map(str::parse).collect();

    if (xx[0] ^ xx[2] ^ xx[4]) & 1 == 0 {
        println!(":-)");
    } else {
        println!(":-(");
    }
}