# import sys; input = sys.stdin.buffer.readline
# sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	S = input()
	T = input()
	if len(T) == 1:
		if S.count(T) == 0:
			print(0)
		else:
			print(-1)
		return

	T2 = T[:-1] + "." + T[-1]
	# print(T2)
	cnt = 0
	# for i in range(10):
	while S.count(T) >= 1:
		S = S.replace(T, T2, 1)
		cnt += 1
		# print(S)
	print(cnt)

if __name__ == '__main__':
	main()