lassie% a.out Enter a line: abcdefghijklmnopqrstuvwxyz Encrypted: tfhxqjemupidckvbaolrzwgnsy Decrypted: abcdefghijklmnopqrstuvwxyz lassie% lassie% a.out Enter a line: this is a secret message Encrypted: rmul ul t lqhoqr cqllteq Decrypted: this is a secret message lassie% lassie% a.out Enter a line: attack at dawn Encrypted: trrthi tr xtgk Decrypted: attack at dawn lassie% lassie% a.out Enter a line: One if by land, two if by sea. Encrypted: vkq uj fs dtkx, rgv uj fs lqt. Decrypted: one if by land, two if by sea. lassie%