I have two tables (A and B) and in Table A there are to fields (IDRespG and IDRespP varchar(13) both) and in table B I have the IDUser (varchar(13)) and UserName

TABLE A:
IDRESPG IDRESPP
22222222 11111111
11111111 73161768

TABLE B:

IDUSER USERNAME
11111111 Peter G
22222222 Charles D
73161768 Vicky B

So, the output should be:

Charles D Peter G
Peter G Vicky B

How can I do this?