program returnMin;
var
i: byte;
q: byte;
a: word;
t: word;
num:array[1..3] of word;
 
procedure swap(var x, y: word);
var temp: word;
begin
temp := x;
x := y;
y := temp;
end;
 
begin
t:=100;
readln(a);
if (a<100) or (a>999) then writeln('Nepravylne chyslo')
else 
for i:=1 to 3 do begin
	num[i] := (trunc(a/t) - trunc(a/(t*10))*10); t := trunc(t/10); end;
if num[2]>num[3] then swap(num[2], num[3]);
if num[1]>num[2] then swap(num[1], num[2]);
if num[2]>num[3] then swap(num[2], num[3]);
writeln(num[1]*100+num[2]*10+num[3]);
end.

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