Hi Dohsan,

Thanks a lot for the solution. This is exactly what i wanted. The solution is working fine for 6 values beyond which it takes a lot of time...

Hi Dohsan,

Thanks for the quick response. The number of words will vary. Sorry that i did not mention this earlier.

The input string can be like 'NA,T1,T1a' or 'NA,T1,T1a,T2'...