UXHE
      ----------
 EHEE ) UXYCQTXQ
       -TEFEX
        =====
         XHCUT
        -FETEU
         =====
          HHUEX
         -XECET
          =====
           ETQYQ
          -HEQEC
           =====
            TEYE

base: 10
symbols: CEFHNQTUXY
difficulty: intermediate
missing: N