parse file-1
for every line:
  remove newline 
  split it using ';' filling an array
  check if the element 1 (array start from 0) of such array is 'Wood'
  if yes create a sub key using element zero of the above array and assign as value an anonymous, empty array []
close file-1

parse file-2
for every line:
  remove newline 
  split it using ';' filling an array
  if the element 2 is an already present key in the hash
    push the element 0 into the values of such key (we have defined it as an anonymous array [] above)
close file-2

print out the datastructure in the way you like