JELR
      +---------
EWPQR | GQPXEUXJ
       -GXTTR
        =====
         TTUTU
        -JTWWJ
         =====
         EXEWPX
        -PLQJJR
         ======
          PTLRJJ
         -PTPPPJ
          ======
            GQWX

base: 12
letters: EGJLMPQRTUWX
difficulty: intermediate
missing: M