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1, 111, 121, 141, 161, 171, 1001, 1111, 1221, 1331, 1441, 1551, 1661, 1771, 1881, 1991, 10001, 10101, 10201, 10401, 10701, 10801, 10901, 11011, 11111, 11211, 11511, 11611, 11711, 11811, 11911, 12021, 12121, 12221, 12321, 12521, 12621, 12921, 13031, 13131, 13231
(list;
graph;
refs;
listen;
history;
text;
internal format)
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