Solution: [
  'ieee',
  'std_cell_lib',
  'gtech',
  'dware',
  'dw07',
  'dw06',
  'dw05',
  'dw02',
  'dw01',
  'dw04',
  'std',
  'ramlib',
  'synopsys',
  'dw03',
  'des_system_lib' ]