program ChuyenXauSangChuThuong;
var
str: string;
i: integer;
begin
write('Nhap mot xau ky tu: ');
readln(str);
for i := 1 to Length(str) do
str[i] := LowerCase(str[i]);
writeln('Xau ky tu chuyen thanh chu thuong la: ', str);
end.