In a certain code language, 'PRANK' is written as '

Solution

The logic followed here is: From the left end, the first two letters are replaced with 3rd succeeding letter, while the last two letters are replaced with 2nd succeeding letter. The middle letter remains unchanged. P         R         A         N         K S         U         A         P         M Code for ‘PRANK’ is SUAPM. G         H         O         S         T J          K         O         U         V Code for ‘GHOST’ is JKOUV. B         R         I           D         E E         U         I           F          G Code for ‘BRIDE’ is EUIFG.