"input" and "output"
Any of these are acceptable for input/output respectivelyRefer to Default for Code Golf: Input/Output methods. The list includes, but not is limited to:
- STDIN/STDOUT
- function argument/return value
- command line arguments/program exit code
- reading from/writing to a file
- dialog boxes
- popping from/pushing to the stack (for stack-based languages like GolfScript; this is essentially the equivalent of a function's arguments/return values for those languages)