实现KMP算法，输入三组主串S和模式串P，输出模式串的Next(j)函数值，以及该P在S中的位置的定位函数值，即序号值。其中S的长度为15~25,P的长度为5~8。-KMP algorithm, enter the three main string S and pattern string P output mode string Next (j) The function value, as well as the P position in the S orientation function value, ie, the serial number value. The length of the S 15 ~ 25, P the length of 5 to 8.