????????
      ----------
PQEPE ) NPUQYYEU
       -PQEPE
        =====
         NTXUY
        -PQEPE
         =====
          MPMUE
         -TRUXU
          =====
          UXTYNU
         -URUNNP
          ======
          ??????

base: 11
symbols: EMNPQRTUWXY
difficulty: hard
missing: W