def main():
    import sys
    input = sys.stdin.readline

    S = input().rstrip('\n')
    T = input().rstrip('\n')
    nt = len(T)
    N = len(S)

    if len(T) == 1:
        if S.count(T) > 0:
            print(-1)
        else:
            print(0)
        exit()

    i = 0
    ans = 0
    while True:
        if S[i:i+nt] == T:
            ans += 1
            i = i+nt-1
        else:
            i += 1
        if i >= N:
            break
    print(ans)


if __name__ == '__main__':
    main()