????????
      +---------
RGUNY | UHGJRQPP
       -RGUNY
        =====
        EPNPQQ
       -EMGRJW
        ======
         EGWWGP
        -EQTWXU
         ======
          ETMPWP
         -EHGPWM
          ======
          ??????

base: 14
letters: EGHJMNPQRTUWXY
difficulty: medium