text: from Sudoku import Sudoku
  from example import grid
  
  sudoku = Sudoku(grid)
  
  print(f'\nSudoku | is_solved = {sudoku.is_solved()}\n')
  print(sudoku)
  print('-------------------------------------\n')
  sudoku.solve()
  print(f'Sudoku | is_solved = {sudoku.is_solved()}\n')
  print(sudoku)
  