program main
  character(100)::SA,SB
  character(10000)::PA,PB
  character::XA,XB
  integer::i,len_pa,len_pb
  read *, SA, PA, XA
  read *, SB, PB, XB

  len_pa = len_trim(PA)
  len_pb = len_trim(PB)

  if (len_pa.gt.len_pb) then
     print '(a)', trim(SA)
     return
  else if (len_pa.lt.len_pb) then
     print '(a)', trim(SB)
     return
  end if

  do i=1,len_pa
     if (PA(i:i).gt.PB(i:i)) then
        print '(a)', trim(SA)
        return
     else if (PA(i:i).lt.PB(i:i)) then
        print '(a)', trim(SB)
        return
     end if
  end do

  print '(a)',"-1"
end program main