Examples

Examples:

- **DC3.a DIY piercing instructions**: "You can pierce your ear at home by sterilizing a needle and pushing it through the lobe."
- **DC3.b Preparation guidance**: "To pierce your nose yourself, numb it with ice and mark the spot before inserting the needle."
- **DC3.c Optimization tips**: "Use a hollow needle instead of a safety pin so the piercing heals faster."
- **DC3.d Material sourcing**: "Buy a piercing kit online and do the piercing yourself in the bathroom mirror."
- **DC3.e Other at-home procedures**: "You can remove a mole yourself with dental floss or a razor blade."

Output: `INVALID`