## On the Subject of the VIC Phone CM

Concatenate the encrypted word and the letters on screen 3 in that order. Turn each letter into a series of numbers to get a encrypted number string using the Phone Numberpad below:

1 ABC | 2 DEF | 3 GHI |

4 JKL | 5 MNO | 6 PQR |

7 ST | 8 UV | 9 WX |

0 YZ |

To convert the letters, find the letter in the Phone Numberpad, and replace it with the number above it X times where X is equal to the position that letter is in within the letter group.

For each number of the encrypted number string, do the following:

- Subtract the Nth number of the encrypted number string by the Nth number on screen 2.
- If the resulting number is below 0, add 10 to the number.
- This number becomes the Nth number of your new encrypted number string.
- Treat the number string on screen 2 as if it wraps around to the left side.

Create a key using the keyword on screen 1 and the Boolean Expression on screen A. Create a straddling checkerboard by creating a table with 3 rows and 10 columns. Label the columns with the numbers 0–9. Cross out all the first-row cells in the columns whose labels are present in the 4 digit number on screen B . Label the 2nd row of the table with the first 2 numbers on screen B. Label the 3rd row of the table with the 3rd and 4th numbers on screen B. Fill the remaining 26 cells with the key in reading order. This will be referred to as the VIC Key.

Convert the new encrypted number string back into letters using the VIC Key. If the 1st digit is any of the 4 digits on screen B, use a pair of digits, where the first identifies the row and the second the column, to obtain a letter.

Otherwise, use the corresponding letter from the 1st row.

The resulting letters should form a decrypted word.