TTP
      +--------
WWEWT | TXUPQPT
       -TTQTJ
        =====
         EEHTP
        -TTQTJ
         =====
         WWTLQT
        -WLWULU
         ======
          WLTXJ

base: 11
letters: CEHJLPQTUWX
difficulty: medium
missing: C