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Fill in the grid so that it contains the digits 1 through 6 three times each. There are no neighbouring cells with the same or with consecutive digits.

Fill in the grid so that it contains the digits 1 through 6 three times each. There are no neighbouring cells with the same or with consecutive digits.

Fill in the grid so that every ring, antipod cell group pairs and cells of the same color contain the numbers 1 through 12.

Fill in the grid so that every ring and every pair of neighboured circle segments contains the digits 1 through 8.

Fill in the grid so that every ring and cells of the same color contains the digits 1 through 8.

Fill in the grid so that every of the lines in the three marked directions and every circle contains the digits 1 through 6.