HHFQ
      +---------
HQFTQ | ETFFHYUH
       -QTEFH
        =====
        NYNYYY
       - QTEFH
        ======
         HQNYEU
        -HTNUNT
         ======
          NFUQNH
         -NQQQHN
          ======
           NEFFN

base: 8
letters: EFHNQTUY
difficulty: easy
restrictions: no multiplication