9000:/(abc|def)(xxx|yyyy)/O
9001:/^(abc|def)(xxx|yyyy)/O
9002:/(^anchored|floating)(XXX|YYY)/O

# Some long literals.
9005:/a{40}/
9006:/a{48}/
9007:/a{49}/
9008:/a{50}/
9009:/q{1000}/
9010:/coagulateshyperinnervationagitationreassuranceexchangeability/
9011:/nonplasticerythematoussnakebitesjubilatedworklessnesses/