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WITH input AS ( SELECT '302(01:03)' AS input_string ), parsed AS ( SELECT SUBSTRING(input_string FROM '^[0-9]{3}') AS prefix, CAST(SUBSTRING(input_string FROM '\((\d+):') AS INTEGER) AS range_start, CAST(SUBSTRING(input_string FROM ':\d+\)') AS INTEGER) AS range_end FROM input ) SELECT prefix || LPAD(generate_series(range_start, range_end)::TEXT, 2, '0') AS account_number FROM parsed

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