let () =
	let o = read_line () in
	let e = read_line () in
	let o_len = String.length o in
	let e_len = String.length e in
	for i = 0 to e_len - 1 do
		print_char o.[i];
		print_char e.[i]
	done;
	if o_len > e_len then begin
		print_char o.[o_len - 1];
		print_newline ()
	end else
		print_newline ()
