21, 111, 123, 141, 177, 201, 303, 321, 327, 411, 417, 447, 471, 717, 723, 771, 1011, 1023, 1041, 1047, 1077, 1101, 1203, 1227, 1317, 1347, 1371, 1401, 1443, 1473, 1707, 2073, 2103, 2127, 2217, 2271, 2307, 2427, 2721, 3003, 3027, 3117, 3147, 3207, 3273, 3327, 3711, 3747, 3777, 4101, 4143, 4227, 4317, 4341, 4377, 4443, 4701, 7017, 7023, 7041, 7071, 7143, 7311, 7323, 7341, 7377, 7401, 7773, 10041, 10077, 10173, 10221, 10347, 10371, 10401, 10407, 10473, 10743, 11073, 11103, 11127, 11217, 11301, 11307, 11721, 12003, 12021, 12147, 12171, 12273, 12417, 12471, 12477, 12723, 12777, 14073, 14277, 14403, 14727, 17007, 17103, 17211, 17223, 17247, 17373, 17403, 17421, 20073, 20103, 20127, 20211, 20343, 20373, 20721, 21003, 21117, 21171, 21207, 21321, 21327, 21477, 21711, 21741, 22047, 22107, 22371, 22377, 22443, 22773, 23007, 23043, 23073, 23223, 23271, 23277, 23703, 23721, 24027, 24117, 24177, 24207, 24243, 24303, 24441, 24711, 27003, 27021, 27123, 27147, 27177, 27201, 27273, 27327, 27411, 27471, 27717, 27723, 27771, 40011, 40017, 40101, 40143, 40323, 40371, 40407, 40701, 40773, 41007, 41043, 41073, 41127, 41271, 41277, 41343, 41421, 41703, 41721, 42027, 42171, 42243, 42321, 42447, 42477, 42747, 43023, 43041, 43107, 43203, 43221, 43311, 43341, 43347, 43773, 44007, 44211, 44223, 44241, 44277, 44301, 47001, 47211, 47217, 47247, 47301, 47373, 47427, 47703, 47721, 70017, 70071, 70107, 70341, 70377, 70701, 70743, 71007, 71223, 71241, 71301, 71403, 71727, 72003, 72021, 72147, 72273, 72321, 72327, 72411, 72717, 72741, 73011, 73077, 73173, 73221, 73317, 73407, 73443, 74073, 74127, 74247, 74301, 74343, 74427, 74721, 77001, 77223, 77241, 77277, 77403, 100041, 100047, 100077, 100173, 100227, 100371, 100407, 100707, 100743, 101217, 101247, 101271, 101301, 101307, 101373, 101427, 102117, 102171, 102423, 102441, 102471, 102477, 102777, 103011, 103101, 103107, 103143, 103317, 103371, 103407, 103773.

772017, 772143, 772203, 772221, 772311, 772341, 772377, 772773, 773121, 773373, 774201, 774303, 774321, 774327, 774471, 774723, 777003, 777027, 777471, 777477.