def sudoku(m):
	# Rows
	for row in m:
		if sorted(row) != list(range(1,10)):
			return False

	# Columns
	for col in range(9):
		temp = []
		for row in range(9):
			temp.append(m[row][col])
		if sorted(temp) != list(range(1,10)):
			return False

	# Squares
	for sqr in range(0,9,3):
		temp = []
		for sqc in range(0,9,3):
			temp.append(m[sqr][sqc:3])
			temp.append(m[sqr+1][sqc:3])
			temp.append(m[sqr+2][sqc:3])
		temp = [x for sub in temp for x in sub]
		if sorted(temp) != list(range(1,10)):
			return False
	return True