????????
      +---------
GRCGJ | NNWRCGLN
       -LYNPP
        =====
        RGJRCG
       -RPLYGJ
        ======
         RYJWCL
        -RJGPCJ
         ======
          RXWPXN
         -RXPXJP
          ======
          ??????

base: 10
letters: CGJLNPRWXY
difficulty: hard