program main
	implicit none
	integer i
	character(50) O, E
	read(*, *) O
	read(*, *) E
	do i = 1, len_trim(E)-1
		write(*, '(a1)', advance = 'No') O(i:i)
		write(*, '(a1)', advance = 'No') E(i:i)
	end do
	if(len_trim(O)-len_trim(E) == 0) then
		write(*, '(a1)', advance = 'No') O(len_trim(E):len_trim(E))
		write(*, '(a1)') E(len_trim(E):len_trim(E))
	else
		write(*, '(a1)', advance = 'No') O(len_trim(E):len_trim(E))
		write(*, '(a1)', advance = 'No') E(len_trim(E):len_trim(E))
		write(*, '(a1)') O(len_trim(E)+1:len_trim(E)+1)
	end if
end program main