import sys
from collections import OrderedDict

S = input()
T = input()
if len(T) == 1 and S == T:
    print(-1)
    sys.exit()
if len(T) == 1 and S.count(T) == 0:
    print(S.count(T))
    sys.exit()
# cnt = S.count(T)
# if len(T) == 1 and cnt == 0:
#     print(cnt)
# elif len(T) == 1 and cnt != 0:
#     print(-1)
# else:
#     print(cnt)


# Z-algorithm
# https://qiita.com/masayoshi361/items/1be110f13412f5431da2
# https://perogram.hateblo.jp/entry/z_algo_revisit
# https://qiita.com/Pro_ktmr/items/16904c9570aa0953bf05
def Z_algo(S):
    n = len(S)
    LCP = [0]*n
    i = 1
    j = 0
    c = 0   # 最も末尾側までLCPを求めたインデックス
    for i in range(1, n):
        # i番目からのLCPが以前計算したcからのLCPに含まれている場合
        if i+LCP[i-c] < c+LCP[c]:
            LCP[i] = LCP[i-c]
        else:
            j = max(0, c+LCP[c]-i)
            while i+j < n and S[j] == S[i+j]:
                j += 1
            LCP[i] = j
            c = i
    LCP[0] = n
    return LCP


# min_T = "".join(OrderedDict.fromkeys(T))
# print(min_T)

# print(Z_algo(S))
z_results = Z_algo(T+S)
# print(z_results)
results = [x for x in z_results[len(T):] if x >= len(T)]
print(len(results))