#1005
S = input()
T = input()
if len(T)==1:
    print(-1)
else:
    ans = 0
    i = 0
    while i < len(S):
        if S[i] == T[0]:
            if S[i:i+len(T)] == T:
                ans += 1
                i += len(T)-1
            else:
                i += 1
        else:
            i += 1
    print(ans)