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Atar kahini ki kivabe thara bana bo
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4567 er por, 12345678 bar bar ase until total digits 2020 ta hoy.
[12345678] ata 2020 naki. Akta akta
only porthom 4 ta digits 4567, setar pore 12345678 bar bar until prothom 4 ta digit soho total 2020 ta digit hoy.