Comment by madmax96

  cicada> echo -e '#!/bin/sh\necho works' > /bin/1
  cicada> chmod +x /bin/1
  cicada> 1
  1

  bash> 1
  works

  cicada> touch a b; echo "$(echo "$(echo "$(ls)")")"
  $(echo $(echo a
  b

  bash> echo "$(echo "$(echo "$(ls)")")"
  a
  b