Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to make a black tooth grin [title] Consider filling a shot glass with a few ice cubes. [step] The black tooth grin is typically served chilled or over ice. If you don't want yours that cold, skip the ice.

Ending1: [title] Fill the glass with 1½ ounces (45 milliliters) of crown royal canadian whisky. [step] For a stronger drink, use 2 ounces (60 milliliters) instead. Ending2: Otherwise, you may use shots made from ice cubes. [title] Pour 2 tablespoons of tapioca powder in the shot glass. Ending3: The ice is the " dessert-must-have " version, but you can enjoy a self-created mouth mask made by simply filling a shot glass and pouring ice water into it. Be sure you fill it halfway up with ice. Ending4: In fact, it may make it extremely cold. To drink normally, fill up the glass to about the halfway point.

Answer format: ending1/ending2/ending3/ending4