[maxmsp] recall index from any data

Hello,

I would like to store a unknown size list at an index.
Then, when any number of this list comes again, I want the index !

I tryed different objects : I can't get coll to give me the index from elmts, funbuff can only store 1 elmt for each index, qlist can't be recalled by index, table can't store multiple data at index. 
Perhaps I'm wrong with these assertions. 

Please do you see any way ?
thanks.