??????
    --------
XXH ) UYEGUM
     -GUE
      ===
      CXNG
     -CTXY
      ====
        UUU
       -GUE
        ===
        CNTM
       - YNT
        ====
        ????

base: 11
symbols: CEFGHMNTUXY
difficulty: medium
hints: G << M
missing: F