????????
      ----------
RRXTN ) QPRRYNGH
       -RRXTN
        =====
        CHRYTN
       - YXXHQ
        ======
         NRXGUG
        -NHRUHU
         ======
          NRTQTH
         -NHRUHU
          ======
          ??????

base: 12
symbols: CGHNPQRTUWXY
difficulty: medium
missing: W