?????????
      +----------
GWGFQ | RTPUQWJNY
       -RXYTX
        =====
         PFRQW
        -PFTQX
         =====
           PXWJN
          -WTPGT
           =====
            RUTFY
           -RXYTX
            =====
            ?????

base: 12
letters: FGJNPQRTUWXY
difficulty: medium