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Start training on this collection. Each time you skip or complete a kata you will be taken to the next kata in the series. Once you cycle through the items in the collection you will revert back to your normal training routine.

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5 kyu
Rot13
87,068Rubikan
Ciphers
Fundamentals
6 kyu
Keyword Cipher Helper
819jacobb
Cryptography
Ciphers
Security
Object-oriented Programming
Strings
5 kyu
First Variation on Caesar Cipher
4,758g964
Fundamentals
Ciphers
Strings
7 kyu
Digital cypher
7,427dcieslak
Fundamentals
Ciphers
Cryptography
7 kyu
Number encrypting: cypher
904dgrcode
Fundamentals
Strings
Ciphers
Cryptography
4 kyu
Vigenère Cipher Helper
7,836jacobb
Algorithms
Ciphers
Security
Object-oriented Programming
Strings
7 kyu
Mirroring cipher
676user8580805
Strings
Cryptography
Security
Algorithms
6 kyu
Simple Substitution Cipher Helper
3,498jacobb
Ciphers
Security
Object-oriented Programming
Strings
Algorithms
6 kyu
Polybius square cipher - encode
1,214tiriana
Cryptography
Ciphers
Algorithms
5 kyu
Vigenère Autokey Cipher Helper
1,205jacobb
Algorithms
Ciphers
Security
Object-oriented Programming
Strings
5 kyu
Caesar Cipher Helper
4,313eugene-bulkin
Ciphers
Object-oriented Programming
Strings
Algorithms
6 kyu
ROT13 variant cipher
611user8580805
Cryptography
Security
Strings
Algorithms
6 kyu
Split Strings
143,938jhoffner
Regular Expressions
Strings
Algorithms
7 kyu
Tap Code Translation
1,846The-Kingfisher
Algorithms
Strings
Cryptography
Security
7 kyu
Cipher
536bubmet
Algorithms
Ciphers
Cryptography
Strings
6 kyu
Simple Encryption #1 - Alternating Split
27,487user5036852
Cryptography
Algorithms
Strings
Arrays
Fundamentals
6 kyu
Change it up
2,591aec58
Strings
Fundamentals
7 kyu
Decoding a message
2,383samhstn
Puzzles
Algorithms
Cryptography
Security
Games
7 kyu
Ce*s*r*d Strings
1,981elmoiv
Puzzles
Strings
Fundamentals
6 kyu
If you can read this...
11,154henryhamon
Fundamentals
5 kyu
ROT13
23,605hvaara
Strings
Ciphers
Regular Expressions
Algorithms
6 kyu
Duplicate Encoder
209,474obnounce
Strings
Arrays
Fundamentals
6 kyu
Your order, please
159,042iamstone
Strings
Fundamentals
6 kyu
Rotation Cipher Cracker
815NicholasSeward
Ciphers
Cryptography
Algorithms
Security
Puzzles
7 kyu
GA-DE-RY-PO-LU-KI cypher
2,210dcieslak
Fundamentals
Ciphers
Cryptography
7 kyu
Digital cypher vol 2
2,925dcieslak
Fundamentals
Ciphers
Cryptography
5 kyu
Simple Pig Latin
154,883user2505876
Regular Expressions
Algorithms
7 kyu
Alphabetical Grid
1,543Djacon
Fundamentals
Algorithms
6 kyu
Reverse or rotate?
22,426g964
Algorithms
Strings
3 kyu
Rail Fence Cipher: Encoding and Decoding
8,090darrentburgess
Algorithms
Ciphers
Cryptography
Strings
Security
7 kyu
Numbers to Letters
6,724PG1
Fundamentals
Strings
Arrays
6 kyu
Inside Out Strings
1,843PG1
Fundamentals
Strings
Arrays
7 kyu
esreveR gnirtS
3,042xDranik
Strings
Fundamentals
7 kyu
Weird words
1,424aSproule
Strings
Regular Expressions
Fundamentals
6 kyu
PhoneWords
1,191mario.mg
Strings
Fundamentals
6 kyu
Calculate String Rotation
7,129obnounce
Strings
Arrays
Algorithms
7 kyu
Frequency sequence
4,650bitfragment
Strings
Fundamentals
7 kyu
Moves in squared strings (I)
12,971g964
Fundamentals
Algorithms
Strings
6 kyu
Kebabize
12,375user4316848
Fundamentals
Strings
Regular Expressions
7 kyu
Loop Array
1,551koldovsky
Arrays
Fundamentals
6 kyu
Keyword Cipher
1,093user8580805
Cryptography
Strings
Algorithms
7 kyu
Word to binary
2,593Hoslack
Fundamentals
6 kyu
Basic Encryption
3,162Tandyman
Mathematics
Strings
Ciphers
7 kyu
The Barksdale Code
2,675milesflo
Cryptography
Puzzles
6 kyu
Decipher this!
9,023yvonne-liu
Strings
Arrays
Ciphers
Fundamentals
5 kyu
Basic Nico variation
1,100dcieslak
Ciphers
Strings
Fundamentals
6 kyu
Reverse Vowels In A String
1,820mmmaaatttttt
Strings
Fundamentals
6 kyu
Condi cipher
333dcieslak
Ciphers
Strings
Algorithms
6 kyu
Vowel Shifting
1,329user5036852
Strings
Regular Expressions
Algorithms
6 kyu
Single Word Pig Latin
1,869MicheDev
Strings
Games
Regular Expressions
6 kyu
Drunk friend
1,060vasekhlav
Strings
Algorithms
Puzzles
7 kyu
Binary to string
980user889396
Binary
Strings
Fundamentals
6 kyu
Grill it!
1,236dcieslak
Strings
Binary
Fundamentals
6 kyu
GA-DE-RY-PO-LU-KI cypher vol 2
796dcieslak
Fundamentals
Ciphers
Cryptography
7 kyu
Compress sentences
1,226mikeos
Lists
Algorithms
6 kyu
Cryptography #1 - Viva Cesare
702Dentzil
Fundamentals
Cryptography
Algorithms
7 kyu
Ultimate Array Reverser
2,635jaybruce1998
Fundamentals
Algorithms