????????
      +---------
APPJT | PMLCMLQQ
       -APPJT
        =====
        CBMJTL
       -CHTACM
        ======
         CAMBPQ
        -CHTACM
         ======
          LAQTBQ
         -LJAMLC
          ======
          ??????

base: 10
letters: ABCHJLMPQT
difficulty: hard