problems.json

{
  "3x5": [
    "03-05-23A",
    "03-05-467",
    "03-05-256",
    "03-05-367",
    "03-05-245",
    "03-05-679"
  ],
  "4x5": [
    "04-05-236A",
    "04-05-2467",
    "04-05-2356",
    "04-05-3467",
    "04-05-2458",
    "04-05-3679",
    "04-05-2568",
    "04-05-2379",
    "04-05-2368",
    "04-05-2679",
    "04-05-236B",
    "04-05-345A",
    "04-05-2357"
  ],
  "5x5": ["05-05-236AB"],
  "5x6": ["05-06-2368AB"],
  "5x7": ["05-07-23568AB"],
  "5x8": ["05-08-234568AB"],
  "5x11": [
    "05-0B-23456789ABC",
    "05-0B-13456789ABC",
    "05-0B-12456789ABC",
    "05-0B-12356789ABC",
    "05-0B-12346789ABC",
    "05-0B-12345789ABC",
    "05-0B-12345689ABC",
    "05-0B-12345679ABC",
    "05-0B-12345678ABC",
    "05-0B-123456789BC",
    "05-0B-123456789AC",
    "05-0B-123456789AB"
  ],
  "5x12": ["05-0C-123456789ABC"],
  "4x15": ["04-0F-123456789ABC"],
  "3x20": ["03-14-123456789ABC"]
}