$ echo "`" > _
(_
is input, i think)
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Answer
Escape the grave accent. It’s special to the shell and is one way (the archaic one) to do command substitution.
echo `
As noted by @dave_thompson_085 an alternative is to use single quotes in lieu of the double quotes you used, or to specify the hexadecimal representation of the grace accent, by doing echo "x60"
. You can find the hexadecimal equivalents of ASCII characters from the ascii
manpages.