var
s: string;
i: integer;
t: set of char;
begin
Writeln('type in a line: ');
Readln(s);
t:= [];
i:= Length(s);
SetLength(s,0); // variant for TP: s[0]:=#0;
for i:=1 to i do begin
if not (s[i] in t) then begin
t:= t+[s[i]];
if s[i] in ['0'..'9'] then s[i]:='0';
s:= s+s[i]
end
end;
Writeln(s);
Readln;
end.