with Ada.Text_IO; use Ada.Text_IO;
with Ada.Integer_Text_IO; use Ada.Integer_Text_IO;

procedure Black is
   A : Integer;
   B : Integer;
   C : Integer;
begin
   Get (A);
   Get (B);
   Get (C);
   if A+B+C >= 22 then
      Put_Line ("bust");
   else
      Put_Line ("win");
   end if;
end Black;