The following JCL will help you to create sort card dynamically.
//jobname   job (acct info),’srinimf’,notify=
//*
//Joblib        DD  DSN=abcd.abc.abcd
//*
//step1  step   exec pgm=IKJEFT01
//*
//output     DD    DSN=output dataset
//sysin    DD   *

select sort_cntl

from (cast(‘xxxxxxxxxxx’) as char(70)) as sort_cntl from sysibm.sysdummy1

union all
.
.
.
.
) x

with UR;
This way using CAST function we can create multiple sort cards into output file.