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var
x, y: string;
f: text;
a: array[0 .. 9] of shortint;
b: shortint;
c: char;
begin
assign(f, 'INPUT.INP');
reset(f);
readln(f, x);
readln(f, y);
close(f);
fillchar(a, 0, sizeof(a));
for c in x do
a[ord(c) - 48] := 1;
for c in y do
begin
b := ord(c) - 48;
if a[b] = 1 then
a[b] := 2
end;
assign(f, 'OUTPUT.OUT');
rewrite(f);
for b := 9 downto 0 do
if a[b] = 2 then
write(f, b);
writeln(f);
close(f)
end.
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