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  1. even(0)
  2. even(s(s(X))):-even(X).
  3. odd(s(0))
  4. odd(s(s(X))):-odd(X).
Compilation error #stdin compilation error #stdout 0s 0KB
stdin
odd(2)
compilation info
prog.pl:2:1: syntax error: . or operator expected after expression
prog.pl:4:1: syntax error: . or operator expected after expression
	2 error(s)
compilation failed
stdout
Standard output is empty