In the gray bag, there are paper fragments that can be put together like a puzzle. These fragments are important. Put them back together and examine the final result carefully.

The encrypted letter is written using symbols. Each symbol corresponds to a letter in the alphabet. To decrypt the letter, you need to translate the symbols into their corresponding alphabetical letters.

You need the layout of the Still Rock office (i.e. the paper fragments you put together) to translate the symbols into alphabetical letters.

The 3x3 grid (written in the upper-left hand corner of the letter) is a clue for how to match the symbols to their corresponding alphabetical letters.

There are 9 letter combinations in the letter ("OA", "OB", "OC", "B", "K", "R", "H", "S", "E".).

These 9 letter combinations are related to the office layout.

Each letter combination is enclosed by one of three shapes.

This gives us up to 27 unique symbols (9*3=27). A symbol is one of the 9 letter combinations enclosed by one of the three shapes.

One of the 27 symbols isn't used, so there are 26 unique symbols. Each symbol can be translated into a unique alphabetical letter.

To translate the symbols* into alphabetical letters, create two 3x3 grids. Each grid should have 9 squares. Fill out the first grid with the 9 letter combinations ("OA", "OB", "OC", "B", "K", "R", "H", "S", "E".) Fill out the second grid with alphabetical letters, placing 3 letters in each square (and only 2 letters in the final square).

To figure out where to place the 9 letter combinations in the first grid, reference the office layout (i.e. the torn fragments you pieced together). Each letter combination represents a room in the office layout (for example, "S" represents "Storage", and "OA" represents "Office A").

*A symbol is one of the 9 letter combinations ("OA", "OB", "OC", "B", "K", "R", "H", "S", "E") enclosed by one of the three shapes.

Your two grids should look like this:

Office Layout Grid*:

[S] [K] [B]

[OA] [H] [OC]

[OB] [E] [R]

Alphabetical Grid:

[ABC] [DEF] [GHI]

[JKL] [MNO] [PQR]

[STU] [VWX] [YZ]

To translate each symbol** into its corresponding alphabetical letter, there are two steps:

• The first step is to match the symbol to its corresponding alphabetical square based on the symbol's letter combination. There are 9 alphabetical squares (as depicted above). For example, [ABC] is a square.
• The second step is to figure out which alphabetical letter the symbol corresponds to based on the symbol's shape. For example, if you determine that a certain symbol corresponds to the alphabetical square "DEF", you would want to figure out if the symbol corresponds to "D", "E", or "F". 

*The office layout grid is created by placing the 9 letter combinations into their relative positions as depicted in the office layout (for example, "S", which represents "Storage", is in the upper left square because it's the upper left area on the office layout).

**A symbol is one of the 9 letter combinations ("OA", "OB", "OC", "B", "K", "R", "H", "S", "E") enclosed by one of the three shapes.

As stated in the previous hint, step one is to match the symbol* to its corresponding alphabetical square based on the symbol's letter combination (the letter combinations are "OA", "OB" etc.).

The 9 letter combinations should be matched to the following alphabetical squares (the letter combination is on the left and the alphabetical square is on the right):

[S]=[ABC]

[K]= [DEF]

[B]= [GHI]

[OA]= [JKL]

[H]= [MNO]

[OC]= [PQR]

[OB]= [STU]

[E]= [VWX]

[R]= [YZ]

As stated in the previous hint, step two is to figure out which alphabetical letter the symbol corresponds to based on the symbol's shape. For example, if your symbol has the letter combination "OA" (which corresponds to the alphabetical square [JKL]), you want to figure out if your symbol corresponds to "J", "K", or "L" based on your symbol's shape.

There are 3 possible shapes for a symbol. The symbol's shape tells you which alphabetical letter (of 3 possibilities) a symbol* corresponds to. You need to map each symbol onto one of three alphabetical letters based on its shape. Your mapping technique should be general (because it has to apply across all alphabetical squares).

To figure out how to use a symbol's shape to map it onto an alphabetical letter, think of the three shapes like rooms. Rooms have four borders (floor, ceiling, left wall, right wall). All 3 shapes have a floor and a ceiling (i.e., there's a line above and below the letter(s) representing a floor and a ceiling). Shape 1 has a left wall (but no right wall), Shape 2 has no walls, and Shape 3 has a right wall (but no left wall). Now, think of each alphabetical square (e.g. [ABC]) like a room.

*A symbol is one of the 9 letter combinations ("OA", "OB", "OC", "B", "K", "R", "H", "S", "E") enclosed by one of the three shapes.

When we write out the alphabet in a 3x3 grid, there are 9 squares, with 3 alphabetical letters in each square*.

Alphabetical Grid:

[ABC] [DEF] [GHI]

[JKL] [MNO] [PQR]

[STU] [VWX] [YZ]

Within each square, alphabetical letters can be in one of three positions: 1) on the left side of the square; 2) in the middle of the square; 3) on the right side of the square.

A symbol's* shape is determined by the alphabetical letter's position in the square.**

• Shape 1 means the alphabetical letter is on the left side of the square.
• Shape 2 means the letter is in the middle of the square.
• Shape 3 means the letter is on the right of the square.

Note that the last square has 2 letters, so it doesn't have a letter on the right side of the square (i.e. shape 3).

*A symbol is one of the 9 letter combinations ("OA", "OB", "OC", "B", "K", "R", "H", "S", "E") enclosed by one of the three shapes.

** In reference to the room analogy from Hint #5, Shape 1 corresponds to alphabetical letters that are on the left side of the room and bordering the left wall (they aren't bordering the right wall because there is a letter to their right), Shape 2 corresponds to letters that are in the middle of the room and surrounded by letters on both sides (so they aren't bordering any walls — i.e. there is no left or right wall beside them), and Shape 3 corresponds to letters that are bordering the right wall of the room.

You can see the legend for decrypting the letter here.

Decrypted, the letter reads:

J-

IF YOU DON'T

PAY BY FRIDAY

THIS IS WHAT I

WANT YOU TO DO:

-GO IN SL'S OFFICE

-LEAVE IT IN PLAIN

SIGHT

-L