Shell Programming and Scripting

AA,3,4,45,+223424234,Tets,Ghdj,+33434,345453434,........................ upto length lets say 41. ( 41 comma sepearted aplha numneric values ).
Now i want 5, 7 and 23 field should be unique or in some incremental order for ex.  if in first line value is 33 then next line, same fields position value should be 34 and so on. All other fields in all the lines can be same
Now for reference this script should refer one sample file and based of that it will create a file with 1 million lines. In my case following is my reference file

1,10,+91900000000,+9112323230000,,1,60,25/1/200923:10:10,3534671234500001,40591912000000001,1001001,1,1,10,3,1,1,1,0,20,+91900000000,329,ss,in_flag,digits,IC_TRUN,OG_TRUNK,NET_IND,realer_st,switch,source,plmn,1,cug_code,ff_call,corela,service3g,conf,op1,op2,op3

for i in $(seq 10);
    do
        echo "a,2,c,d,5,6" | awk -v v=$i 'BEGIN {FS=OFS=","} {$2=v$2;$3=v$3;$5=v$5}{print}'
done

Output:
a,12,1c,d,15,6
a,22,2c,d,25,6
a,32,3c,d,35,6
a,42,4c,d,45,6
a,52,5c,d,55,6
a,62,6c,d,65,6
a,72,7c,d,75,6
a,82,8c,d,85,6
a,92,9c,d,95,6
a,102,10c,d,105,6

#!/bin/bash
> VoiceCDR.txt
echo "Recordtype:1"  >> VoiceCDR.txt

for i in $(seq 1000);
    do
        echo "2009/11/07 13:45:15,1024,+9199511000,+9198000000,,1,42,2009/11/07 13:45:15,,4059192908198221,,3,1025,0.596,1,1,1,1,,0,0,+9199511000,,CallType_Out_Int,,,919032006820,,,,,,,,19,,0,,1,,Account-1,269192908198221,,,," | awk -v v=$i 'BEGIN {FS=OFS=","} {$3=+$3+v;$4=+$4+v;$22=+$22+v}{print}' >> VoiceCDR.txt
done

perl -pi -e "s:,91:,+91:g" VoiceCDR.txt