Linux emulator hint: `$ bin/linapple --conf etc/linapple/linapple.conf --autoboot --d1 strick2026-six-lines.dsk -f`

```
] CATALOG

] LOAD SIX2026

] RUN
GJH AFKTL YQVPW CVO
?
```

The program prints a cryptogram.
It's a simple fixed single-letter substitution cypher.

At the prompt, you can type two letters and hit Return.
The first letter is the original letter you see in the cypher text.
The second letter is the plaintext letter you want to change it to.

Example: The original cyphertext is this:

`GJH AFKTL YQVPW CVO`

You guess the first word is THE, so you first enter "GT"
to change the G to a T, then you enter "JH" to change the
J to an H, and finally enter "HE" to change the H to an E.

Now you see

`THE AFKTL YQVPW CVO`

and you can continue mapping letters.  Notice you are entering the
original cryptogram letter as the first letter, but you may no
longer be seeing that original letter if you already remapped it.

Hint: do not under any circumstances enter just a "@" instead of two letters.

  -- Henry Strickland -- strick@yak.net
