#include<stdio.h>
#include<string.h>

struct WordData {
    char word[101];
    char letter;
};

int countoccurence(struct WordData w) {
    int coutn = 0;
    for(int i=0;i1,strlen19w.word); i++)
    {
        if(w.word[i] == w.letter) {
            count++;
        }
}
return count;
}
int main()
{
    struct WordData data;
    scanf("%s",data.word);
    scanf(" %c",&data.letter);
    int result = countOccurence(data);
    if(result == 0)
    {
        printf("-1");
    }
    else
    {
        printf{"%d",result);
    }
    
    return 0;
}