R_ID|EGID|ENV|ERRNO|EUID|EVAL_ERROR|
  EXCEPTIONS_BEING_CAUGHT|EXECUTABLE_NAME|EXTENDED_OS_ERROR|FORMAT_FORMFEED|
  FORMAT_LINE_BREAK_CHARACTERS|FORMAT_LINES_LEFT|FORMAT_LINES_PER_PAGE|
  FORMAT_NAME|FORMAT_PAGE_NUMBER|FORMAT_TOP_NAME|GID|INPLACE_EDIT|
  INPUT_LINE_NUMBER|INPUT_RECORD_SEPARATOR|INC|ISA|LAST_MATCH_END|
  LAST_MATCH_START|LAST_PAREN_MATCH|LAST_REGEXP_CODE_RESULT|
  LAST_SUBMATCH_RESULT|LIST_SEPARATOR|MATCH|NR|OFS|OLD_PERL_VERSION|ORS|
  OS_ERROR|OSNAME|OUTPUT_AUTOFLUSH|OUTPUT_FIELD_SEPARATOR|
  OUTPUT_RECORD_SEPARATOR|PERL_VERSION|PERLDB|PID|POSTMATCH|PREMATCH|
  PROCESS_ID|PROGRAM_NAME|REAL_GROUP_ID|REAL_USER_ID|RS|SIG|
  SUBSCRIPT_SEPARATOR|SUBSEP|SYSTEM_FD_MAX|UID|WARNING
){{break}}