let read () = Scanf.scanf "%d.%d.%d " (fun a b c -> a, b, c)

let () =
  let a, b, c = read () in
  let x, y, z = read () in
  let p =
    if a < x then false
    else if a > x then true
    else if b < y then false
    else if b > y then true
    else if c < z then false
    else if c > z then true
    else true in
  print_endline (if p then "YES" else "NO")