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. 2013 Jun 6;8(6):e64694. doi: 10.1371/journal.pone.0064694

Table 2. Sets Inline graphic – plus sign (+) indicates that the given element belongs to the set, minus (−) sign indicates that the element does not belong to the set.

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
S 11 + + + + + + + +
S 12 + + + + + + + +
S 13 + + + + + + + +
S 21 + + + + + + + +
S 22 + + + + + + + +
S 23 + + + + + + + +
S 31 + + + + + + + +
S 32 + + + + + + + +
S 33 + + + + + + + +