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var
f: text;
s: string;
min: byte = 255;
procedure palen(
s: string;
tmp: smallint
);
begin
if tmp + length(s) >= min then
exit;
if length(s) < 2 then
begin
min := tmp + length(s);
exit
end;
if s[1] = s[length(s)] then
palen(copy(s, 2, length(s) - 2), tmp + 2)
else
begin
palen(copy(s, 2, length(s) - 1), tmp + 2);
palen(copy(s, 1, length(s) - 1), tmp + 2)
end
end;
begin
assign(f, 'BAI3.INP');
reset(f);
read(f, s);
close(f);
palen(s, -length(s));
assign(f, 'BAI3.OUT');
rewrite(f);
writeln(f, min);
close(f)
end.
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