#include<stdio.h>
#include<string.h>
struct wordData{
    char str[101];
    char ch;
};
int countOccurence(struct wordData w)
{
    int count = 0;
    for(int i = 0; i < strlen(w.str); i++)
    {
        if(w,str[i] == w,ch)
        {
            count++;
        }
        if(count == 0)
        {
            return -1;
        }
        return count;
}
int main()
{
    struct wordData w;
    scanf("&s", w,str);
    scanf("%c", w.ch);
    int result = countOccurence(w);
    printf("%d", result);
    return 0;
}