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1, 11, 21, 121, 131, 231, 241, 1331, 441, 1441, 1451, 2541, 2551, 2651, 2751, 14641, 14651, 4851, 4861, 15851, 5061, 15961, 15971, 27951, 17161, 28061, 9261, 29161, 29171, 30261, 30271, 161051, 30471, 161161, 31571, 53361, 53371, 53471, 53571
(list;
graph;
refs;
listen;
history;
text;
internal format)
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