$input: \b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z;
.result {
  dquoted: "#{#{$input}}";
  dquoted: "#{"[#{$input}]"}";
  dquoted: "#{"#{$input}"}";
  dquoted: "#{'#{$input}'}";
  dquoted: "#{"['#{$input}']"}";
  squoted: '#{#{$input}}';
  squoted: '#{"[#{$input}]"}';
  squoted: '#{"#{$input}"}';
  squoted: '#{'#{$input}'}';
  squoted: '#{"['#{$input}']"}';
}