{
  "exercise": "alphametics",
  "version": "1.1.0",
  "cases": [
    {
      "description": "Solve the alphametics puzzle",
      "cases": [
        {
          "description": "puzzle with three letters",
          "property": "solve",
          "puzzle": "I + BB == ILL",
          "expected": {
            "I": 1,
            "B": 9,
            "L": 0
          }
        },
        {
          "description": "solution must have unique value for each letter",
          "property": "solve",
          "puzzle": "A == B",
          "expected": null
        },
        {
          "description": "leading zero solution is invalid",
          "property": "solve",
          "puzzle": "ACA + DD == BD",
          "expected": null
        },
        {
          "description": "puzzle with four letters",
          "property": "solve",
          "puzzle": "AS + A == MOM",
          "expected": {
            "A": 9,
            "S": 2,
            "M": 1,
            "O": 0
          }
        },
        {
          "description": "puzzle with six letters",
          "property": "solve",
          "puzzle": "NO + NO + TOO == LATE",
          "expected": {
            "N": 7,
            "O": 4,
            "T": 9,
            "L": 1,
            "A": 0,
            "E": 2
          }
        },
        {
          "description": "puzzle with seven letters",
          "property": "solve",
          "puzzle": "HE + SEES + THE == LIGHT",
          "expected": {
            "E": 4,
            "G": 2,
            "H": 5,
            "I": 0,
            "L": 1,
            "S": 9,
            "T": 7
          }
        },
        {
          "description": "puzzle with eight letters",
          "property": "solve",
          "puzzle": "SEND + MORE == MONEY",
          "expected": {
            "S": 9,
            "E": 5,
            "N": 6,
            "D": 7,
            "M": 1,
            "O": 0,
            "R": 8,
            "Y": 2
          }
        },
        {
          "description": "puzzle with ten letters",
          "property": "solve",
          "puzzle": "AND + A + STRONG + OFFENSE + AS + A + GOOD == DEFENSE",
          "expected": {
            "A": 5,
            "D": 3,
            "E": 4,
            "F": 7,
            "G": 8,
            "N": 0,
            "O": 2,
            "R": 1,
            "S": 6,
            "T": 9
          }
        },
        {
          "description": "puzzle with ten letters and 41 addends",
          "property": "solve",
          "puzzle": "THIS + A + FIRE + THEREFORE + FOR + ALL + HISTORIES + I + TELL + A + TALE + THAT + FALSIFIES + ITS + TITLE + TIS + A + LIE + THE + TALE + OF + THE + LAST + FIRE + HORSES + LATE + AFTER + THE + FIRST + FATHERS + FORESEE + THE + HORRORS + THE + LAST + FREE + TROLL + TERRIFIES + THE + HORSES + OF + FIRE + THE + TROLL + RESTS + AT + THE + HOLE + OF + LOSSES + IT + IS + THERE + THAT + SHE + STORES + ROLES + OF + LEATHERS + AFTER + SHE + SATISFIES + HER + HATE + OFF + THOSE + FEARS + A + TASTE + RISES + AS + SHE + HEARS + THE + LEAST + FAR + HORSE + THOSE + FAST + HORSES + THAT + FIRST + HEAR + THE + TROLL + FLEE + OFF + TO + THE + FOREST + THE + HORSES + THAT + ALERTS + RAISE + THE + STARES + OF + THE + OTHERS + AS + THE + TROLL + ASSAILS + AT + THE + TOTAL + SHIFT + HER + TEETH + TEAR + HOOF + OFF + TORSO + AS + THE + LAST + HORSE + FORFEITS + ITS + LIFE + THE + FIRST + FATHERS + HEAR + OF + THE + HORRORS + THEIR + FEARS + THAT + THE + FIRES + FOR + THEIR + FEASTS + ARREST + AS + THE + FIRST + FATHERS + RESETTLE + THE + LAST + OF + THE + FIRE + HORSES + THE + LAST + TROLL + HARASSES + THE + FOREST + HEART + FREE + AT + LAST + OF + THE + LAST + TROLL + ALL + OFFER + THEIR + FIRE + HEAT + TO + THE + ASSISTERS + FAR + OFF + THE + TROLL + FASTS + ITS + LIFE + SHORTER + AS + STARS + RISE + THE + HORSES + REST + SAFE + AFTER + ALL + SHARE + HOT + FISH + AS + THEIR + AFFILIATES + TAILOR + A + ROOFS + FOR + THEIR + SAFE == FORTRESSES",
          "expected": {
             "A": 1,
             "E": 0,
             "F": 5,
             "H": 8,
             "I": 7,
             "L": 2,
             "O": 6,
             "R": 3,
             "S": 4,
             "T": 9
          }
        }
      ]
    }
  ]
}