{
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  "task": "I need to automate cashflow generation for approximately 1,500 bonds where each bond has a principal amount in column A, interest in column B, payment frequency in column C (1 for annual, 2 for semi-annual, 4 for quarterly), and maturity date in column D, with date headers in row 4 from E4 to AB4. Create formulas in the range E6:AB25 that display \"-\" in row 5, and for rows 6-25 calculate cashflows showing interest payments at regular intervals based on the frequency working backwards from the maturity date, principal plus interest at the maturity date, and \"-\" for non-payment dates, then center align the entire E6:AB25 range while preserving existing number formatting."
}