Level      Easy         Normal         Expert 
  1        BSCKT        DLRGS          ZBVDS 
  2        JWLYX        BGSFM          JNGLQ 
  3        RSVP         PRHG           HNYTM 
  4        DXCPT        WNPQVX         KVNF 
  5        SLMN         NMRYL          DWNGH 
  6        ZTHRK        SNTHN          STBRM 
  7        CRLQXZ       KLZHT          RDBQLR