// KMP.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include <iostream>
#include <sstream>
#define I_N_MAX 10000
using namespace std;

void KmpSearch(char[], char[], int[]);
void GetNextval(char[], int next[]);

int main(){
	int nextarr[I_N_MAX];
	char cArr1[I_N_MAX];
	char cArr2[I_N_MAX];
	cin >> cArr1;
	cin >> cArr2;
	GetNextval(cArr1, nextarr);
	KmpSearch(cArr1, cArr2, nextarr);
	system("pause");
}



void KmpSearch(char s[], char p[], int nextarr[]){

	int i = 0, j = 0;
	int sLenth = strlen(s);
	int pLenth = strlen(p);
	while (i < sLenth&&j < pLenth)
	{
		if (j == -1 || s[i] == p[j]){
			i++, j++;
		}
		else{
			j = nextarr[j];
		}
	}
	if (j == pLenth){
		stringstream ss;
		int temp = i - j + 1;
		ss << "第" << temp << "个字母到第" << i << "个字母为匹配字符";
		cout << ss.str()<<endl;
	}
	else
	{
		cout << "None" << endl;
	}
}


void GetNextval(char p[], int nextarr[]){

	int pLenth = strlen(p);
	nextarr[0] = -1;
	int k = -1;
	int j = 0;
	while (j < pLenth - 1)
	{
		if (k == -1 || p[j] == p[k]){
			j++, k++;
			if (p[j] != p[k]){
				nextarr[j] = k;
			}
			else
			{
				nextarr[j] = nextarr[k];
			}
		}
		else
		{
			k = nextarr[k];
		}
	}
}