YNTM
     +--------
PUYN | QMMXJTJ
      -LTWU
       ====
       PXPQJ
      -PFLLP
       =====
        PQHTT
       -PXFNT
        =====
          NPRJ
         -QNXG
          ====
          PYLW

base: 15
letters: FGHJLMNPQRTUWXY
difficulty: medium