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Train Now

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
91,941Rubikan
Ciphers
Fundamentals
6 kyu
Keyword Cipher Helper
917jacobb
Cryptography
Ciphers
Security
Object-oriented Programming
Strings
5 kyu
First Variation on Caesar Cipher
4,847g964
Fundamentals
Ciphers
Strings
7 kyu
Digital cypher
7,896dcieslak
Fundamentals
Ciphers
Cryptography
7 kyu
Number encrypting: cypher
998dgrcode
Fundamentals
Strings
Ciphers
Cryptography
4 kyu
Vigenère Cipher Helper
8,283jacobb
Algorithms
Ciphers
Security
Object-oriented Programming
Strings
7 kyu
Mirroring cipher
714user8580805
Strings
Cryptography
Security
Algorithms
6 kyu
Simple Substitution Cipher Helper
3,619jacobb
Ciphers
Security
Object-oriented Programming
Strings
Algorithms
6 kyu
Polybius square cipher - encode
1,234tiriana
Cryptography
Ciphers
Algorithms
5 kyu
Vigenère Autokey Cipher Helper
1,216jacobb
Algorithms
Ciphers
Security
Object-oriented Programming
Strings
5 kyu
Caesar Cipher Helper
4,916eugene-bulkin
Ciphers
Object-oriented Programming
Strings
Algorithms
6 kyu
ROT13 variant cipher
632user8580805
Cryptography
Security
Strings
Algorithms
6 kyu
Split Strings
156,827jhoffner
Regular Expressions
Strings
Algorithms
7 kyu
Tap Code Translation
1,886The-Kingfisher
Algorithms
Strings
Cryptography
Security
7 kyu
Cipher
572bubmet
Algorithms
Ciphers
Cryptography
Strings
6 kyu
Simple Encryption #1 - Alternating Split
28,562user5036852
Cryptography
Algorithms
Strings
Arrays
Fundamentals
6 kyu
Change it up
2,677aec58
Strings
Fundamentals
7 kyu
Decoding a message
2,506samhstn
Puzzles
Algorithms
Cryptography
Security
Games
7 kyu
Ce*s*r*d Strings
2,088elmoiv
Puzzles
Strings
Fundamentals
6 kyu
If you can read this...
12,139henryhamon
Fundamentals
5 kyu
ROT13
26,153hvaara
Strings
Ciphers
Regular Expressions
Algorithms
6 kyu
Duplicate Encoder
221,498obnounce
Strings
Arrays
Fundamentals
6 kyu
Your order, please
169,329iamstone
Strings
Fundamentals
6 kyu
Rotation Cipher Cracker
834NicholasSeward
Ciphers
Cryptography
Algorithms
Security
Puzzles
7 kyu
GA-DE-RY-PO-LU-KI cypher
2,587dcieslak
Fundamentals
Ciphers
Cryptography
7 kyu
Digital cypher vol 2
3,171dcieslak
Fundamentals
Ciphers
Cryptography
5 kyu
Simple Pig Latin
163,260user2505876
Regular Expressions
Algorithms
7 kyu
Alphabetical Grid
1,588Djacon
Fundamentals
Algorithms
6 kyu
Reverse or rotate?
23,249g964
Algorithms
Strings
3 kyu
Rail Fence Cipher: Encoding and Decoding
8,591darrentburgess
Algorithms
Ciphers
Cryptography
Strings
Security
7 kyu
Numbers to Letters
7,124PG1
Fundamentals
Strings
Arrays
6 kyu
Inside Out Strings
1,908PG1
Fundamentals
Strings
Arrays
7 kyu
esreveR gnirtS
3,166xDranik
Strings
Fundamentals
7 kyu
Weird words
1,491aSproule
Strings
Regular Expressions
Fundamentals
6 kyu
PhoneWords
1,220mario.mg
Strings
Fundamentals
6 kyu
Calculate String Rotation
7,300obnounce
Strings
Arrays
Algorithms
7 kyu
Frequency sequence
4,835bitfragment
Strings
Fundamentals
7 kyu
Moves in squared strings (I)
13,422g964
Fundamentals
Algorithms
Strings
6 kyu
Kebabize
12,863user4316848
Fundamentals
Strings
Regular Expressions
7 kyu
Loop Array
1,603koldovsky
Arrays
Fundamentals
6 kyu
Keyword Cipher
1,129user8580805
Cryptography
Strings
Algorithms
7 kyu
Word to binary
2,679Hoslack
Fundamentals
6 kyu
Basic Encryption
3,239Tandyman
Mathematics
Strings
Ciphers
7 kyu
The Barksdale Code
2,720milesflo
Cryptography
Puzzles
6 kyu
Decipher this!
9,333yvonne-liu
Strings
Arrays
Ciphers
Fundamentals
5 kyu
Basic Nico variation
1,123dcieslak
Ciphers
Strings
Fundamentals
6 kyu
Reverse Vowels In A String
1,938mmmaaatttttt
Strings
Fundamentals
6 kyu
Condi cipher
339dcieslak
Ciphers
Strings
Algorithms
6 kyu
Vowel Shifting
1,367user5036852
Strings
Regular Expressions
Algorithms
6 kyu
Single Word Pig Latin
1,977MicheDev
Strings
Games
Regular Expressions
6 kyu
Drunk friend
1,110vasekhlav
Strings
Algorithms
Puzzles
7 kyu
Binary to string
1,020user889396
Binary
Strings
Fundamentals
6 kyu
Grill it!
1,310dcieslak
Strings
Binary
Fundamentals
6 kyu
GA-DE-RY-PO-LU-KI cypher vol 2
1,025dcieslak
Fundamentals
Ciphers
Cryptography
7 kyu
Compress sentences
1,265mikeos
Lists
Algorithms
6 kyu
Cryptography #1 - Viva Cesare
739Dentzil
Fundamentals
Cryptography
Algorithms
7 kyu
Ultimate Array Reverser
2,718jaybruce1998
Fundamentals
Algorithms