????????
      +---------
NHNHL | QULQQNUY
       -NHNHL
        =====
        LHQWNN
       -LHGGQC
        ======
          QCJQU
         -NHNHL
          =====
          LJHCRY
         -LJHJGG
          ======
          ??????

base: 12
letters: CGHJLNPQRUWY
difficulty: medium
hints: P << L
missing: P