Please if someone can help me... i don't know well Regular Expression and i want to use a regular expresssion on this example:

I have 2 strings delimitated by comma:

1) a,b,c,d,e,f,g,h,$chr(44),$chr(46),i,j,k i.e. %string1 = a,b,c,d,e,f,g,h,$chr(44),$chr(46),i,j,k
2) i,j,k,l,m,n,o,p,r,s,t,a,$chr(44),u i.e. %string2 = i,j,k,l,m,n,o,p,r,s,t,a,$chr(44),u

So i want a regular expression that will tell me if any symbol from the first %string1 is containing in the second %string2 or not. I want to let you know that could be any symbol: letter, number etc.)

Thank you in advance.