UENW
      +---------
RJMJJ | WUMHUEGM
       -RJMJJ
        =====
        UUJHRE
       -UUHPJY
        ======
          UNRPGM
         - HJNJM
          ======
           UGMWN

base: 13
letters: EGHJMNPRTUWXY
difficulty: intermediate
restrictions: no multiplication
hints: T << X
missing: X T