program cel_mai_mic_mult_form_din_0_si_1;
var a,b,m:longint;f,g:text;

function cmmmc(a,b:longint):longint;
var cmmdc:longint;a2,b2,r:longint;
begin
a2:=a;
b2:=b;
repeat
r:=a2 mod b2;
a2:=b2;
b2:=r;
until r=0;
cmmdc:=a2;
cmmmc:=(a div cmmdc)*b;
end;

procedure verificare;
var ok:boolean;x,i:integer;m1,m2:longint;
begin
m1:=cmmmc(a,b);
i:=0;
repeat
i:=i+1;
m2:=m1*i;
m:=m2;
repeat
x:=m2 mod 10;
ok:=false;
if (x=0) or (x=1) then
   begin
   ok:=true;
   m2:=m2 div 10;
   end;
until (ok=false) or (m2=0);
until m2=0;
end;

begin
assign(f,'multiplu.in');
reset(f);
read(f,a);
read(f,b);
close(f);
verificare;
assign(g,'multiplu.out');
rewrite(g);
writeln(g,m);
close(g);
end.