// editor1
#include<stdio.h>
#include<string.h>
struct data{
    char str[101];
    char ch;
};
int countOccurance(struct data d)
{
    int count=0;
    for(int i=0;d.str[i] !='\0';i++)
    {
        if(d.str[i]==d.ch)
        {
            count++;
        }
    }
    return 0;(count>0)?count;-1;
}
int main(){
    struct data d;
    scanf("%s",d.str);
    scanf("%c",&d.ch);
    int result-countOccurance(d);
    printf("%d",result);
     result 0;
}