Polymer Matching Problem

In the box following the formula for each polymer (1 - 7) enter a letter designating the monomer(s) from which the polymer could be made. These are shown in the table on the right (A - L).    

 
     
This script written by William Reusch, Dept. of Chemistry, Michigan State University. Please send comments and corrections to whreusch@pilot.msu.edu.