Problem in cursor query

hi
i got the problem in cursor.
i have a table called trav. with one column named "sno". i inserted values as 1,2,5,10.
only upto 1-10 are allwed to enter ,
now i want remaining numbers as 3,4,6,7,8,9.
but this gives answer as 3,4,5,6,7,8,9.
here 5 is repeated so i tried a lot but invain.
my code is
declare
cursor cc is select sno from trav order by sno;
a number(2);
begin
open cc;
for i in 1..10
loop
fetch cc into a;
if (i != a )
then
dbms_output.put_line(i);
end if;
end loop;
end;
so i want the output correctly whereas it returnd as 5 repeated value.
please help me. waiting for repl

DECLARE
CURSOR cc
IS
SELECT DISTINCT sno
FROM trav
ORDER BY sno;
i NUMBER (2) := 1;
BEGIN
FOR a IN cc
LOOP
IF (i != a.sno) AND a.sno <= 10
THEN
WHILE i < a.sno
LOOP
DBMS_OUTPUT.PUT_LINE (i);
i := i + 1;
END LOOP;
END IF;
i := i + 1;
END LOOP;
END;
null

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