S = list(input())
T = list(input())
if len(T) == 1:
	if T[0] in S:
		print(-1)
	else:
		print(0)
	exit()
ans = 0
for i in range(len(S) - len(T) + 1):
	if S[i:i+len(T)] == T:
		S[i+len(T)-2] = "."
		ans += 1
print(ans)