#include<stdio.h>
#include<string.h>
#define MAX 80
int ondeEsta(char frase1[], char frase2[])
{
	int i,j,count=0,n=0;

	for(i=0;i<strlen(frase1);i++)
	{	if(frase1[i]==frase2[0]){
		for(j=0;j<strlen(frase2);j++)
		{
			if(frase1[i] == frase2[j])
			{
				count++;
				if(strlen(frase2) == count)
				{
					return i-count;
				}
				i++;
				n++;
			}
			else count =0;i=i-n+1;break;
		}}
	}
	return -1;
}
int main(void)
{
	char frase1[MAX],frase2[MAX];

	gets(frase1);
	gets(frase2);

	printf("%d\n",ondeEsta(frase1,frase2));

	return 0;
}