# OK BOOMER

```
7778866{844444777_7446666633_444777_26622244433668}
```

Since the flag starts with `sun{`, we know that:

1. 777 -\> s
2. 88 -\> u
3. 66 -\> n

It reminds me of the telephone keypad, where each keypad maps to multiple characters, and you must repeat to select the correct character. However, the `7` keypad is weird, `777` should be `r` instead of `s`. Nevertheless, we can guess the flag out:

- part 1:

  - 8 -\> t
  - 44444 -\> hi/ih
  - 777 -\> s
  - `this`
- part 2:

  - 7 -\> p
  - 44 -\> h
  - 66666 -\> no/on
  - 33 -\> e
  - `phone`
- part 3:

  - 444 -\> i
  - 777 -\> s
  - `is`
- part 4:

  - 2 -\> a
  - 66 -\> n
  - 222 -\> c
  - 444 -\> i
  - 33 -\> e
  - 66 -\> n
  - 8 -\> t

Flag: `sun{this_phone_is_ancient}`.