QJT
      +---------
WWMJA | MJJQWTRW
       -JTPWQA
        ======
         JMRQTR
        - WWMJA
         ======
          WJJPRW
         -FTFPTA
          ======
           JFTPW

base: 10
letters: AFGJMPQRTW
difficulty: intermediate
restrictions: no multiplication
missing: G