#include<stdio.h>
#include<string.h>
struct wordData
{
    char word[101];
    char letter;
};
int countOccurrence(struct WorldData w)
{
    int count =0;
    for(int i=0;i<strlen(w.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 = countOccurrence(data);
int result ==0
{
    printf("-1");
}
else
{
    printf("%d",result);
}
return 0;
}
}