# $Echo
The page looks like is passing our input to the `echo` command filtering some kind of characters. Looks like it wont parse \` so we can execute, for example, the `ls` command putting \`ls\`. Also we can use `<` so we can tell bash to pass a file content to `echo`.
Putting \`ls ../\` return `flag.txt html` as output, so there is the flag. Lets try this:````<../flag.txt````And we get the flag:
```flag{1beadaf44586ea4aba2ea9a00c5b6d91}```