UMR
       +---------
ULJTCL | NGURLXPQ
        -LQXJRP
         ======
         ULUTCLP
        -UUGQGRP
         =======
          UXJTJXQ
         -GMQURCL
          =======
            QXNNC

base: 12
letters: CGJLMNPQRTUX
difficulty: medium