QJNN
      +---------
RYTNP | JNLZLXVL
       -TXYMX
        =====
        QMUWRX
       -QTHMGX
        ======
         UHXMHV
        - LVZUM
         ======
          UQJLUL
         - LVZUM
          ======
           RUQHT

base: 16
letters: GHJLMNPQRTUVWXYZ
difficulty: medium