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ACCRUED EXPENSES (Tables)
3 Months Ended
Jul. 31, 2022
Payables and Accruals [Abstract]  
Schedule of accrued expenses
        
   July 31, 2022   April 30, 2022 
Payroll related costs  $148,581   $118,062 
R&D costs   377,155    377,155 
Other   4,595    3,792 
Total  $530,331   $499,009