电路具有四路4_bit字宽的串行输入总线，四路4_bit字宽的输出总线信号的电路。

电路完成将串行输入信号A[3..0]、B[3..0]、C[3..0]、D[3..0]（大小排列无序）以数值大小排序输出的功能，输出X3[3..0]、X2[3..0]、X1[3..0]、X0[3..0]中X3最大，X0最小。输入数据是无符号整数。

-Circuit with four 4_bit word wide serial input bus, four 4_bit word wide output bus signal circuit.

Complete the circuit serial input signal A[3..0], B[3..0], C[3..0], D[3..0] (the size of order disorder) to the numerical size of the sort output function, X3[3..0], X2[3..0], X1[3..0] output, X0[3..0] X3 maximum, minimum X0. The input data is an unsigned integer.