perl -E "system $^X, '-E', 'say for @ARGV', qq(\x22abc\x22 d e)"
perl -E "system $^X, '-E', 'say for @ARGV', qq(a\x5c\x5c\x5cb d\x22e f\x22g h)"
perl -E "system $^X, '-E', 'say for @ARGV', qq(a\x5c\x5c\x5c\x22b c d)"
perl -E "system $^X, '-E', 'say for @ARGV', qq(a\x5c\x5c\x5c\x5c\x22b c\x22 d e)"