PEQ
      +--------
YNYYQ | QYYQGCN
       -TQTCL
        =====
        YGRPLC
       -YHQMTP
        ======
         PEPPNN
        -PQGRPG
         ======
           RNYH

base: 12
letters: CEGHLMNPQRTY
difficulty: hard