This adverbial phrase that very well defined by our colleague Jorge Luis brings to mind a joke told in the Congress of deputies of Spain Manuel Fraga, q. e. p. d., Minister in the dictatorship, parliamentary democracy and one of the fathers of the Constitution. It was Fraga who had come to a town a stranger saying that he also killed rats and mice, and that it would be cheaper than the rat that had, so they hired him at the time of the Pied Piper of Hamelin. Then the stranger was placed in the middle of the square next to a Bank, opened a knife of good size that was and he said to them: come! leave them through one by one, one after the other.
