KöMaL 2012 C1132

Which of the fractions $A=\frac{\overbrace{333\ldots 33}^{2012\text{ pieces}} 1}{\underbrace{333\ldots 33}_{2012\text{ pieces}} 4} \text{and} B=\frac{\overbrace{222\ldots 22}^{2012\text{ pieces}} 1}{\underbrace{222\ldots 22}_{2012\text{ pieces}} 3}$ is greater?