PLJX
      +---------
HWQMR | RPRWTPLE
       -HWQMR
        =====
        PGQREP
       -PQERLH
        ======
         LWUHQL
        -LLWJTM
         ======
          JMQMGE
         -LREHQQ
          ======
           GQRJM

base: 13
letters: EGHJLMPQRTUWX
difficulty: intermediate
restrictions: no multiplication