fn read_vec<T: std::str::FromStr>() -> Vec<T> {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().split_whitespace()
      .map(|e| e.parse().ok().unwrap()).collect()
}
  
fn main() {
    let tapiocas: Vec<u32> = read_vec();
    let (a1, a2, a3) = (tapiocas[0], tapiocas[2], tapiocas[4]);
    
    let odd_count = a1 % 2 + a2 % 2 + a3 % 2;

    if odd_count == 0 || odd_count == 2 {
        println!(":-)");
    } else {
        println!(":-(");
    }
}