In a certain code language, ‘ROAST’ is coded as ‘XWESV’, then how is 'SWIFT' coded as in the given language?

In each word, the letters are replaced by 4th succeeding letter as per English alphabetical series and then, they are written in reverse order to get the code. R         O         A         S         T          +4        +4        +4        +4        +4 V         S         E         W        X X         W        E         S         V Code for ‘ROAST’ is XWESV. S         W        I           F          T          +4        +4        +4        +4        +4 W        A         M         J          X X         J          M         A         W Code for ‘SWIFT’ is XJMAW.