User Exit to make NR of Business Partner and Contract Account which is A/N as internally assigned

[aamna]

Hi guys,

We are doing an implementation project on S4Hana for SAP ISU

We received requirement our client wants number range series for Business Partner and Contract Account number as alphanumeric(A/N) that too which should be internally assigned

Eg BP -->AP1000000.......................AP1999999

CA-->JP1000000.......................JP1999999

Do we have any user exit for Business Partner and Contract Account where we can apply the logic of concatenation of function module NUMBER_GET_NEXT and series like AP or JP

Please provide any user exit or package or any other enhancement

It is very urgent

Thanks in advance