YYU
      +--------
YNRPT | YXELUEP
       -YNRPT
        =====
         YTLEE
        -YNRPT
         =====
          EHENP
         -HFPPX
          =====
          YUEQH

base: 12
letters: EFHLNPQRTUXY
difficulty: medium
missing: Q