????????
      +---------
YACGY | FLATGYLG
       -YACGY
        =====
        YFEYEY
       -YFYAYA
        ======
          NNNNL
         -YACGY
          =====
          TWLFTG
         -TNCNWC
          ======
          ??????

base: 10
letters: ACEFGLNTWY
difficulty: hard