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

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

int countOccurrence(struct WordData w) {
    int count = 0 ;
    for(int i=0;i<steler(w.word); i++)
{
    if(w.word[i] == w.letter) {
        count++;
    }
}
retutn 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("")
    }