YYER
      +---------
QWGWY | GJGJPLMY
       -XRXJQ
        =====
         PRJML
        -XRXJQ
         =====
         RPLWPM
        -RGGQWG
         ======
           EYQXY
          -QWGWY
           =====
            MWLJ

base: 12
letters: EGJLMPQRUWXY
difficulty: medium
missing: U