Build the program: tap each line to add it in order, then use to indent lines inside a loop, if or function.
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Your program
Lines
result = result + str(grid[1][0])
result = str(grid[0][0])
print(result)
grid = [[1, 2], [3, 4]]
result = result + str(grid[0][1])
result = result + str(grid[1][1])
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