# ▼▼▼Watch Your Head (50pts)▼▼▼
**This writeup is written by [@kazkiti_ctf](https://twitter.com/kazkiti_ctf)**

Every time I send a request, I can see that the `X-Data header` and the `Data-X cookie` values have changed.

Try to get in order.

↓

```
X-Data: t
Set-Cookie: Data-X=i
X-Data: m
Set-Cookie: Data-X=c
X-Data: t
Set-Cookie: Data-X=f
X-Data: {
Set-Cookie: Data-X=c
X-Data: 0
Set-Cookie: Data-X=n
X-Data: g
Set-Cookie: Data-X=r
X-Data: 4
Set-Cookie: Data-X=t
X-Data: s
Set-Cookie: Data-X=_
X-Data: y
Set-Cookie: Data-X=0
X-Data: u
Set-Cookie: Data-X=_
X-Data: w
Set-Cookie: Data-X=4
X-Data: t
Set-Cookie: Data-X=c
X-Data: h
Set-Cookie: Data-X=3
X-Data: d
Set-Cookie: Data-X=_
X-Data: y
Set-Cookie: Data-X=0
X-Data: u
Set-Cookie: Data-X=r
X-Data: _
Set-Cookie: Data-X=h
X-Data: 3
Set-Cookie: Data-X=4
X-Data: D
Set-Cookie: Data-X=D
X-Data: D
Set-Cookie: Data-X=_
X-Data: _
Set-Cookie: Data-X=%7D
X-Data: t
Set-Cookie: Data-X=i
X-Data: m
Set-Cookie: Data-X=c
X-Data: t
Set-Cookie: Data-X=f
X-Data: {
Set-Cookie: Data-X=c
X-Data: 0
Set-Cookie: Data-X=n
X-Data: g
Set-Cookie: Data-X=r
```

↓

`timctf{c0ngr4ts_y0u_w4tch3d_y0ur_h34DDD__}`