Challenge: solve this multiple inheritance problem in your favorite language

[mw]

On Thursday, 4 June 2020 at 07:11:26 UTC, mw wrote:
> Note: the `--` commented out line, followed by the compiler 
> error message: "Fatal Error ...."

Note: the `--` commented out line in class BANK and DOCTOR, if 
un-commented, will get the compiler error message "Fatal Error 
...."