! 2019.12.8
!
      program answer
      implicit none
      integer,dimension(3) :: A
      integer :: i
!
      read(*,*) (A(i),i=1,3)
      if(A(1)+A(2)+A(3) > 21) then
        write(*,*) 'bust'
      else 
        write(*,*) 'win'
      end if
      end program answer