Answers

2016-07-03T18:13:16+08:00
For me ... { }, {1}, {2}, {3}, {4}, {5}, {6}, {7}, {1,2} {1,3} {1,4} {1,5} {1,6} {1,7} {2,3} {2,4} {2,5} {2,6} {2,7} {3,4} {3,5} {3,6} {3,7} {4,5} {4,6} {4,7} {5,6} {5,7} {6,7}{1,2,3} {1,2,4} {1,2,5} {1,2,6} {1,2,7}{1,3,4}{1,3,5}{1,3,6} {1,3,7} {1,4,5}{1,4,6}{1,4,7}{1,56}{157}{167}{1234}{1235}{1236}{1237}{1245}{1246}{1247}{1256}{1257}{1267}{1345}{1346}{1347}{1356}{1357}{1367}{1456}{1457}{1467}{1567}{2345}{2346}{2347}{2356}{2357}{2367}{2456}{2457}{2467}{2567}{3456}{3457}{3467}{3567}{4567}{12345}{12346}{12347}{12356}{12357}{12367}{12456}{12457}{12467}{12567}{13456}{13457}{13467}{13567}{14567}{23456}{23457}{23467}{23567}{23567}{24567}{34567}{123456}{123457}{123467}{123567}{124567}{134567}{234567}{1234567}
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