string
ascii-art
kolmogorev-complexity
math
graphical-output or image-processing
array-manipulation
restricted-source
geometry
grid
game
random
combinatorics
quine
decision-problem
date
sorting
parsing
base-conversion
graph-theory
binary
path-finding
permutations
source-layout
interpreter
optimization
puzzle-solver
regular-expression
chess
printable-ascii
palindrom
natural-language
fibonacci
cryptography
code-generation
hello-world
fractal
compression
music
balanced-string
polyglot
matrix
internet