account numbers=abc123 and xyz123

20080618,adfadf,adfadf,abc123,ljlkjll,
20080618,jfjfjf,bmbmbm,abc123,zzzdddd,
20080618,343434,959595,abc123,fjadfaf, <==parse
20080618,adfadf,adfadf,xyz123,ljlkjll,
20080618,adxxxf,gggsss,xyz123,ggaaddf,
20080618,dddfff,dfdfdd,xyz123,xxxxxd, <==parse