The minimum number that can be added to another number to get a sum greater than 15 is 8 (since 8 + 8 = 16). So, we can have the following pairs:
(8, 8), (8, 9), (8, 10), ..., (8, 12)
(9, 9), (9, 10), ..., (9, 12)
(10, 10), (10, 11), (10, 12)
(11, 11), (11,
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