Write a function to shift all four counters, calling two functions for shifting three counters, and one function for shifting one counter.
写一个函数来转移所有四个筹码，调用两个函数来转移三个筹码，并且用一个函数来转移一个筹码。
The drive system on Model TCM870 loader features three-element torque converter and counter shaft, constant mesh, power-shift transmission.
TCM 870装载机传动系统，采用三元件液力变矩器和定轴式常啮合动力换档变速器。
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