????????
      ----------
MNNYM ) EEMNWNXJ
       -MNNYM
        =====
        QJTYGN
       -QLMGYM
        ======
         JYLEJX
        -JJTWML
         ======
          CJCNXJ
         -CCQYWL
          ======
          ??????

base: 12
symbols: CEGJLMNQTWXY
difficulty: hard