program main
  implicit none
  character*3::b,f
  integer*8::N,bx,fx,i,bp,fp
  data bx,fx/2*0/
  read *,b,N,f

  do i=1,3
     if(b(i:i).eq.'x') bx = bx + 1
     if(f(i:i).eq.'x') fx = fx + 1
  end do

  if(bx.ne.fx) then
     print '(a)', "SUCCESS"
     return
  else if(bx.eq.3.or.bx.eq.0) then
     print '(a)', "FAILURE"
     return
  end if

  if(bx.eq.1) then
     bp = SCAN(b,'x')
     fp = SCAN(f,'x')
  else
     bp = SCAN(b,'o')
     fp = SCAN(f,'o')
  end if

  if(MOD(fp+bp,2).eq.MOD(N,2)) then
     print '(a)', "FAILURE"
     return
  else
     print '(a)', "SUCCESS"
     return
  end if
end program main