def checker(string, error, ans=0, start=0):
    for i in range(start, len(string) - len(error) + 1):
        if i + len(error) > len(string) + 1:
            return ans
        if string[i: i + len(error)] == error:
            return checker(string, error, ans + 1, i + len(error) - 1)

string = input()
error = input()

if 1 == len(error):
    for i in string:
        if i == error:
            print('-1')
            exit()
    print('0')
    exit()

if len(error) > len(string):
    print('0')
    exit()

print(checker(string, error))