B tu

B tuB tuB tuB tuB tuB tu
B tuB tuB tuB tuB tuB tu
B tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tuB tu