What will be the output of

Select STUFF('12345678ABC',1,Patindex('%[a|b|c|d]%',REVERSE(REVERSE('12345678ABC')))-1,REPLICATE('ABC',5))?

The STUFF('12345678ABC',1,Patindex('%[a|b|c|d]%',REVERSE(REVERSE('12345678ABC')))-1 will return ABC and the Replicate will return ABC 5 times. So total 6 times ABC will appear