????????
      +---------
TTJXQ | LLLYELYL
       -LXPTPJ
        ======
         MYLUPY
        -MMQPXN
         ======
          QYTNTL
         -QYXLEJ
          ======
          ??????

base: 12
letters: EJLMNPQRTUXY
missing: R
difficulty: challenging