prompt: Bertha plays tennis. Every ten games, one of her tennis balls wears out. Every five games, she loses a ball. Every four games, she buys a canister of three balls. She started with two balls and gave one to her partner. After twenty games, how many tennis balls does she have?
messages.content: Bertha plays tennis. Every ten games, one of her tennis balls wears out. Every five games, she loses a ball. Every four games, she buys a canister of three balls. She started with two balls and gave one to her partner. After twenty games, how many tennis balls does she have?
messages.role: user
messages.content: Bertha wears out 20 / 10 = <<20/10=2>>2 tennis balls in 20 games.
  She loses 20 / 5 = <<20/5=4>>4 tennis balls in 20 games.
  She buys canisters of 3 * 20 / 4 = <<3*20/4=15>>15 tennis balls in 20 games.
  Bertha started with 2 balls and gave 1 away, so she has 2 + 15 - 2 - 4 - 1 = <<2+15-2-4-1=10>>10 tennis balls after twenty games.
  #### 10
messages.role: assistant