safe    B2953            '8079' -> B2953: queued (L. Mahendra)
safe    B2953            '0000' -> no bill with that number and phone
safe    x' OR 1=1 --     ''     -> no bill with that number and phone
unsafe  B2953            '8079' -> B2953: queued (L. Mahendra)
unsafe  B2953            '0000' -> no bill with that number and phone
unsafe  x' OR 1=1 --     ''     -> B0001: departed (I. Pratama)
