program  ABC_089_B_HinaArare
   implicit none
   integer N ,i
   character(1), allocatable :: S(:)
   read(*, *) N
   allocate(S(1: N))
   read(*, *) S(1: N)
   do i =1, N
      if(S(i) == 'Y') then
	      write(*, *) 'Four'
		  exit
	  else if(i == N) then
	      write(*, *) 'Three'
	  end if
   end do
end program  ABC_089_B_HinaArare