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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
91,050Rubikan
Ciphers
Fundamentals
6 kyu
Keyword Cipher Helper
901jacobb
Cryptography
Ciphers
Security
Object-oriented Programming
Strings
5 kyu
First Variation on Caesar Cipher
4,828g964
Fundamentals
Ciphers
Strings
7 kyu
Digital cypher
7,831dcieslak
Fundamentals
Ciphers
Cryptography
7 kyu
Number encrypting: cypher
984dgrcode
Fundamentals
Strings
Ciphers
Cryptography
4 kyu
Vigenère Cipher Helper
8,201jacobb
Algorithms
Ciphers
Security
Object-oriented Programming
Strings
7 kyu
Mirroring cipher
708user8580805
Strings
Cryptography
Security
Algorithms
6 kyu
Simple Substitution Cipher Helper
3,601jacobb
Ciphers
Security
Object-oriented Programming
Strings
Algorithms
6 kyu
Polybius square cipher - encode
1,232tiriana
Cryptography
Ciphers
Algorithms
5 kyu
Vigenère Autokey Cipher Helper
1,214jacobb
Algorithms
Ciphers
Security
Object-oriented Programming
Strings
5 kyu
Caesar Cipher Helper
4,869eugene-bulkin
Ciphers
Object-oriented Programming
Strings
Algorithms
6 kyu
ROT13 variant cipher
625user8580805
Cryptography
Security
Strings
Algorithms
6 kyu
Split Strings
155,021jhoffner
Regular Expressions
Strings
Algorithms
7 kyu
Tap Code Translation
1,879The-Kingfisher
Algorithms
Strings
Cryptography
Security
7 kyu
Cipher
564bubmet
Algorithms
Ciphers
Cryptography
Strings
6 kyu
Simple Encryption #1 - Alternating Split
28,364user5036852
Cryptography
Algorithms
Strings
Arrays
Fundamentals
6 kyu
Change it up
2,665aec58
Strings
Fundamentals
7 kyu
Decoding a message
2,486samhstn
Puzzles
Algorithms
Cryptography
Security
Games
7 kyu
Ce*s*r*d Strings
2,074elmoiv
Puzzles
Strings
Fundamentals
6 kyu
If you can read this...
12,073henryhamon
Fundamentals
5 kyu
ROT13
25,693hvaara
Strings
Ciphers
Regular Expressions
Algorithms
6 kyu
Duplicate Encoder
219,465obnounce
Strings
Arrays
Fundamentals
6 kyu
Your order, please
167,723iamstone
Strings
Fundamentals
6 kyu
Rotation Cipher Cracker
831NicholasSeward
Ciphers
Cryptography
Algorithms
Security
Puzzles
7 kyu
GA-DE-RY-PO-LU-KI cypher
2,557dcieslak
Fundamentals
Ciphers
Cryptography
7 kyu
Digital cypher vol 2
3,145dcieslak
Fundamentals
Ciphers
Cryptography
5 kyu
Simple Pig Latin
161,758user2505876
Regular Expressions
Algorithms
7 kyu
Alphabetical Grid
1,584Djacon
Fundamentals
Algorithms
6 kyu
Reverse or rotate?
23,101g964
Algorithms
Strings
3 kyu
Rail Fence Cipher: Encoding and Decoding
8,495darrentburgess
Algorithms
Ciphers
Cryptography
Strings
Security
7 kyu
Numbers to Letters
7,069PG1
Fundamentals
Strings
Arrays
6 kyu
Inside Out Strings
1,901PG1
Fundamentals
Strings
Arrays
7 kyu
esreveR gnirtS
3,160xDranik
Strings
Fundamentals
7 kyu
Weird words
1,478aSproule
Strings
Regular Expressions
Fundamentals
6 kyu
PhoneWords
1,217mario.mg
Strings
Fundamentals
6 kyu
Calculate String Rotation
7,281obnounce
Strings
Arrays
Algorithms
7 kyu
Frequency sequence
4,808bitfragment
Strings
Fundamentals
7 kyu
Moves in squared strings (I)
13,348g964
Fundamentals
Algorithms
Strings
6 kyu
Kebabize
12,793user4316848
Fundamentals
Strings
Regular Expressions
7 kyu
Loop Array
1,599koldovsky
Arrays
Fundamentals
6 kyu
Keyword Cipher
1,125user8580805
Cryptography
Strings
Algorithms
7 kyu
Word to binary
2,663Hoslack
Fundamentals
6 kyu
Basic Encryption
3,228Tandyman
Mathematics
Strings
Ciphers
7 kyu
The Barksdale Code
2,713milesflo
Cryptography
Puzzles
6 kyu
Decipher this!
9,291yvonne-liu
Strings
Arrays
Ciphers
Fundamentals
5 kyu
Basic Nico variation
1,117dcieslak
Ciphers
Strings
Fundamentals
6 kyu
Reverse Vowels In A String
1,926mmmaaatttttt
Strings
Fundamentals
6 kyu
Condi cipher
339dcieslak
Ciphers
Strings
Algorithms
6 kyu
Vowel Shifting
1,363user5036852
Strings
Regular Expressions
Algorithms
6 kyu
Single Word Pig Latin
1,957MicheDev
Strings
Games
Regular Expressions
6 kyu
Drunk friend
1,105vasekhlav
Strings
Algorithms
Puzzles
7 kyu
Binary to string
1,014user889396
Binary
Strings
Fundamentals
6 kyu
Grill it!
1,299dcieslak
Strings
Binary
Fundamentals
6 kyu
GA-DE-RY-PO-LU-KI cypher vol 2
1,008dcieslak
Fundamentals
Ciphers
Cryptography
7 kyu
Compress sentences
1,260mikeos
Lists
Algorithms
6 kyu
Cryptography #1 - Viva Cesare
737Dentzil
Fundamentals
Cryptography
Algorithms
7 kyu
Ultimate Array Reverser
2,707jaybruce1998
Fundamentals
Algorithms