XJQT
      +---------
PPUJP | JYLPLJWY
       -PPUJP
        =====
        PTPPJJ
       -PRLRPM
        ======
         TXPPLW
        -TRXGEU
         ======
          XQEMLY
         -XRREUJ
          ======
           QYYPE

base: 13
letters: EGJLMPQRTUWXY
difficulty: medium
restrictions: no multiplication