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11, 41, 4111, 4441, 11411, 14411, 41141, 41411, 44111, 1114111, 1144141, 1144441, 1411141, 1411411, 1441411, 1444111, 1444411, 1444441, 4141441, 4414411, 4441111, 4441441, 11111141, 11141111, 11141441, 11441141, 11441411, 14111441, 14141411
(list; graph; refs; listen; history; internal format)
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