????????
      ----------
XWGYP ) TGQPRNTN
       -TGNQY
        =====
          WYNNT
         -WLXXU
          =====
           WWXRN
          -XWGYP
           =====
          ??????

base: 12
symbols: GLMNPQRTUWXY
missing: M
difficulty: medium
hints: N << T, Y << M, R << P