24.68 — Following Directions

Prof. Scott Weiss (see solution)

The ability to follow instructions carefully is vital in all walks of life.
To pass this course, simply follow the instructions available in the oral exam at:
web.mit.edu/puzzle/directions.aiff

In the event of an internet catastrophe, a copy of this exam can be picked up at the Enigmatology office

Archivist's note: The audio was incredibly noisy; it sounded like they had recorded it ourdoors on a windy day. A noise-reduced version is available. The packet of archive material also included a transcript of this audio, presented below, which I assume was the alternate version mentioned above.

In this puzzle, we'll be testing your ability to follow directions. First, let me introduce you to four friends of mine. For now, everything they say is true, so be sure to listen to them.

Hi, I'm Lydia. When the puzzle begins, do what I tell you only if I give you an even numbered instruction.

Hellow, I'm Beth. Once we get started, do what I tell you only if I read an odd numbered instruction.

Greetings, my name is Andrew. Only follow my instructions if you just performed the previous instruction.

And last, but not least, I'm Rich. You should only follow one of my instructions if you did not follow the previous instruction.

You will now hear a series of instructions. Each consists of a number, followed by a command. When deciding whether or not to perform an instruction, follow the rules you were just told. Ready? Begin.

(Lydia)
0.
Write the phrase "Change of Pace" on a piece of paper.
(Rich)
1.
Delete the "f".
(Rich)
2.
Move the second letter to the position fourth from the end.
(Andrew)
3.
Put a "u" between the third and fourth letters.
(Rich)
4.
Change the "g" to an "o".
(Beth)
5.
Double the fourth consonant.
(Andrew)
6.
Shift the second consonant two back in the alphabet, so "d" would go to "b", for example.
(Lydia)
7.
Reverse the middle three letters.
(Lydia)
8.
Swap the first two vowels.
(Andrew)
9.
Swap the second consonant with the second consonant from the end.
(Beth)
10.
Remove the "h".
(Andrew)
11.
Put the "l" before the second "e".
(Lydia)
12.
Change the third consonant to an "m".
(Rich)
13.
Delete every fourth letter starting with the second.
(Beth)
14.
Duplicate any substring that is the name of a playing card.
(Beth)
15.
Change the "h" to a "t".
(Rich)
16.
Swap the fifth consonant with the second vowel.
(Andrew)
17.
Remove the middle two letters.
(Beth)
18.
Place a "b" after the "c".
(Lydia)
19.
Swap the first and last letters.
(Rich)
20.
Drop the first "a".
(Andrew)
21.
Swap the fourth and fifth letters.

You can stop now.