JCL for Concatenate more than one dataset though sort

Two days back I have written one JCL to concatenate 8 datasets into one dataset using JCL.
I am going to post the JCL here so that I can have a reference for my own.

1. Here the input files should be of same DCB parameter and all the input files are flat files.

The JCL is as follows:

//NUMHP53A   JOB ,'SYNC',MSGCLASS=Q,MSGLEVEL=(1,1), //                                  NOTIFY=&SYSUID //STEP01   EXEC PGM=SORT                                        //SORTIN        DD DSN=NUMHP53.MAITREE.DATA1,                        //                     DISP=SHR                                          //                     DD DSN=NUMHP53.MAITREE.DATA2,                        //                     DISP=SHR                                          //                     DD DSN=NUMHP53.MAITREE.DATA3,                        //                      DISP=SHR                                          //                     DD DSN=NUMHP53.MAITREE.DATA4,                        //                     DISP=SHR                                          //                     DD DSN=NUMHP53.MAITREE.DATA5,                        //                     DISP=SHR                                          //                     DD DSN=NUMHP53.MAITREE.DATA6,                        //                     DISP=SHR                                          //                     DD DSN=NUMHP53.MAITREE.DATA7,                        //                    DISP=SHR                                          //                    DD DSN=NUMHP53.MAITREE.DATA8,                        //                    DISP=SHR                                          //SORTOUT   DD DSN=NUMHP53.MAITREE.DATA9,                     //         DISP=(MOD,CATLG,DELETE),                          //         UNIT=SYSDA,SPACE=(TRK,(1,1),RLSE),                //         DCB=(RECFM=FB,LRECL=80,BLKSIZE=800,BUFNO=30)      //SYSOUT   DD SYSOUT=*                                       //SYSIN    DD *                                                    SORT FIELDS=(1,10,CH,A)                                /*                                                           //*

Input datasets:

VIEW       NUMHP53.MAITREE.DATA1                           Columns 00001 00072 Command ===>                                                  Scroll ===> CSR  ****** ***************************** Top of Data ****************************** 000001 45785214                                                                000002 1111111                                                                  000003 457851426                                                               ****** **************************** Bottom of Data **************************** VIEW       NUMHP53.MAITREE.DATA2                           Columns 00001 00072 Command ===>                                                  Scroll ===> CSR  ****** ***************************** Top of Data ****************************** 000001 2222222                                                                 ****** **************************** Bottom of Data **************************** VIEW       NUMHP53.MAITREE.DATA3                           Columns 00001 00072 Command ===>                                                  Scroll ===> CSR  ****** ***************************** Top of Data ****************************** 000001 333333                                                                  ****** **************************** Bottom of Data **************************** VIEW       NUMHP53.MAITREE.DATA4                           Columns 00001 00072 Command ===>                                                  Scroll ===> CSR  ****** ***************************** Top of Data ****************************** 000001 4444444                                                                  ****** **************************** Bottom of Data ****************************                                                                                VIEW       NUMHP53.MAITREE.DATA5                           Columns 00001 00072 Command ===>                                                  Scroll ===> CSR  ****** ***************************** Top of Data ****************************** 000001 55555555                                                                 ****** **************************** Bottom of Data **************************** VIEW       NUMHP53.MAITREE.DATA6                           Columns 00001 00072 Command ===>                                                  Scroll ===> CSR  ****** ***************************** Top of Data ****************************** 000001 66666                                                                   ****** **************************** Bottom of Data **************************** VIEW       NUMHP53.MAITREE.DATA7                           Columns 00001 00072 Command ===>                                                  Scroll ===> CSR  ****** ***************************** Top of Data ****************************** 000001 777777                                                                   ****** **************************** Bottom of Data **************************** VIEW       NUMHP53.MAITREE.DATA8                           Columns 00001 00072 Command ===>                                                  Scroll ===> CSR  ****** ***************************** Top of Data ****************************** 000001 888888                                                                  ****** **************************** Bottom of Data ****************************

 Output Dataset:

VIEW       NUMHP53.MAITREE.DATA9                           Columns 00001 00072 Command ===>                                                  Scroll ===> CSR  ****** ***************************** Top of Data ****************************** 000001 1111111                                                                 000002 2222222                                                                 000003 333333                                                                  000004 4444444                                                                  000005 55555555                                                                000006 66666                                                                   000007 777777                                                                   000008 888888                                                                  000009 1111111                                                                 000010 2222222                                                                  000011 333333                                                                  000012 4444444                                                                 000013 45785214                                                                 000014 457851426                                                               000015 55555555                                                                000016 66666                                                                   000017 777777                                                                  000018 888888                                                                  000019 1111111                                                                 000020 2222222                                                                  000021 333333                                                                  000022 4444444                                                                 000023 457851426                                                                000024 45785214                                                                000025 55555555                                                                000026 66666                                                                    000027 777777                                                                  000028 888888                                                                  ****** **************************** Bottom of Data ****************************