#include <iostream>
#include <string.h>
using namespace std;
const int LETTERS = 50;
const int LINE = 1;

void main()
{
	int i = 0, j, counter = 0, sizeOfStringOne = 0, sizeOfStringTwo = 0, result;
	char str1[LINE][LETTERS], str2[LETTERS];

	cout << "please enter a string (max " << LETTERS - 1 << " letters): ";
	for (i = 0; i < LINE; i++)
		cin.getline(str1[i], LETTERS);

	cout << "please enter another string (max " << LETTERS - 1 << " letters): ";
	cin.getline(str2, LETTERS);

	sizeOfStringTwo = strlen(str2);
	sizeOfStringOne = strlen(str1[1]);
	for (i = 0, j = 0; sizeOfStringOne>0 && counter != sizeOfStringTwo; sizeOfStringOne--, i++)
	{
		for (; str1[1][i] == str2[j]; j++, i++)
		{
			counter++;
			if (counter == 1)
			{
				result = i;
			}
		}
		if (counter != sizeOfStringTwo)
			counter = 0;
	}
	if (counter == sizeOfStringTwo)
		cout << "\nthe second string begin in index " << result << " in the first string.\n\n";
	else
		cout << "\n" << -1 << "\n\n";
	system("pause");
	system("cls");
}