class SudokuSolver {

    validate(puzzleString) {
    }

    checkRowPlacement(puzzleString, row, column, value) {

    }

    checkColPlacement(puzzleString, row, column, value) {

    }

    checkRegionPlacement(puzzleString, row, column, value) {

    }

    solve(puzzleString) {

    }
}

module.exports = SudokuSolver;