Codebusters Cheat Sheet Science Olympiad, Cheat Sheet of Computer science

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2025/2026

Uploaded on 03/26/2026

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Reference Tables (Codebusters B/C) L
A
T
E
X by Caleb Chiang
A B C D E F G H I J K L
M
N O P Q R S T U V
W
XYZ
0123456789
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
13579
11 15 17 19 21 23 25
1 9
21 15
3
19
7
23 11
5
17 25
Keys|abcdefghijklmnopqrstuvwxyz
---------------------------------------------------------
A,B|nopqrstuvwxyzabcdefghijklm
C,D|opqrstuvwxyznmabcdefghijkl
E,F|pqrstuvwxyznolmabcdefghijk
G,H|qrstuvwxyznopklmabcdefghij
I,J|rstuvwxyznopqjklmabcdefghi
K,L|stuvwxyznopqrijklmabcdefgh
M,N|tuvwxyznopqrshijklmabcdefg
O,P|uvwxyznopqrstghijklmabcdef
Q,R|vwxyznopqrstufghijklmabcde
S,T|wxyznopqrstuvefghijklmabcd
U,V|xyznopqrstuvwdefghijklmabc
W,X|yznopqrstuvwxcdefghijklmab
Y,Z|znopqrstuvwxybcdefghijklma
1
pf2

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Reference Tables (Codebusters B/C) LATEX by Caleb Chiang

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Keys| a b c d e f g h i j k l m n o p q r s t u v w x y z

A,B | n o p q r s t u v w x y z a b c d e f g h i j k l m C,D | o p q r s t u v w x y z n m a b c d e f g h i j k l E,F | p q r s t u v w x y z n o l m a b c d e f g h i j k G,H | q r s t u v w x y z n o p k l m a b c d e f g h i j I,J | r s t u v w x y z n o p q j k l m a b c d e f g h i K,L | s t u v w x y z n o p q r i j k l m a b c d e f g h M,N | t u v w x y z n o p q r s h i j k l m a b c d e f g O,P | u v w x y z n o p q r s t g h i j k l m a b c d e f Q,R | v w x y z n o p q r s t u f g h i j k l m a b c d e S,T | w x y z n o p q r s t u v e f g h i j k l m a b c d U,V | x y z n o p q r s t u v w d e f g h i j k l m a b c W,X | y z n o p q r s t u v w x c d e f g h i j k l m a b Y,Z | z n o p q r s t u v w x y b c d e f g h i j k l m a 1

Reference Tables (Codebusters B/C) LATEX by Caleb Chiang

A AAAAA B AAAAB C AAABA D AAABB E AABAA F AABAB

G AABBA

H AABBB

I/J ABAAA

K ABAAB

L ABABA

M ABABB

N ABBAA

O ABBAB

P ABBBA

Q ABBBB

R BAAAA

S BAAAB

T BAABA

U/V BAABB

W BABAA

X BABAB

Y BABBA

Z BABBB

Frequency of English Letters

E - 12.51%

T - 9.25%

A - 8.04%

O - 7.60%

I - 7.26%

N - 7.0%

S - 6.54%

R - 6.12%

H - 5.49%

L - 4.14%

D - 3.99%

C - 3.06%

U - 2.71%

M - 2.53%

F - 2.30%

P - 2.00%

G - 1.96%

W - 1.92%

Y - 1.73%

B - 1.54%

V - 0.99%

K - 0.6%

X - 0.1%

J - 0.1%

Q - 0.1%

Z - 0.0%

Frequency of Spanish Letters

E - 14.08%

A - 12.16%

O - 9.20%

S - 7.20%

N - 6.83%

R - 6.4%

I - 5.98%

L - 5.24%

U - 4.69%

D - 4.67%

T - 4.60%

C - 3.8%

M - 3.08%

P - 2.89%

B - 1.49%

H - 1.18%

Q - 1.1%

Y - 1.09%

V - 1.05%

G - 1.00%

F - 0.69%

J - 0.52%

Z - 0.4%

ร‘ - 0.1%

X - 0.1%

K - 0.1%

W - 0.0%

For the purposes of cryptograms it is customary to treat n and รฑ as distinct letters, but a and รก are the same letter. Likewise for e and รฉ, and i and รญ. In other words, all the accent marks get amputated when working with cryptograms. Also, while some older Spanish dictionaries consider ch, ll, and rr, to be their own lettersโ€”this has fallen out of modern usage. Accordingly, โ€œburroโ€ is considered as five letters: โ€œb-u-r-r-oโ€ and not as four letters โ€œb-u-rr-o.โ€

Morse Code

A โˆ’

B โˆ’

C โˆ’ โˆ’

D โˆ’

E

F โˆ’

G โˆ’ โˆ’

H

I

J โˆ’ โˆ’ โˆ’

K โˆ’ โˆ’

L โˆ’

M โˆ’ โˆ’

N โˆ’

O โˆ’โˆ’โˆ’

P โˆ’โˆ’

Q โˆ’โˆ’ โˆ’

R โˆ’

S

T โˆ’

U โˆ’

V โˆ’

W โˆ’ โˆ’

X โˆ’ โˆ’

Y โˆ’ โˆ’ โˆ’

Z โˆ’ โˆ’