s = str(input())
t = str(input())

if len(t) == 1:
    if t in set(list(s)):
        print(-1)
    else:
        print(0)
    exit()

def z_algorithm(s):
    n = len(s)
    Z = [0]*n
    Z[0] = n
    i = 1
    j = 0
    while i < n:
        while i+j < n and s[j] == s[i+j]:
            j += 1
        Z[i] = j
        if j == 0:
            i += 1
            continue
        k = 1
        while i+k < n and k+Z[k] < j:
            Z[i+k] = Z[k]
            k += 1
        i += k
        j -= k
    return Z

Z = z_algorithm(t+s)
#print(Z)
ans = 0
i = len(t)
while i < len(Z):
    if Z[i] >= len(t):
        ans += 1
        i += len(t)-1
    else:
        i += 1

print(ans)