s = input()
t = input()
ans = 0
if len(t) == 1:
    if t[0] in list(s):
        print(-1)
    else:
        pass

for i in range(len(s)):
    for j in range(len(t)):
        if not t[j] == s[i+j]:
            break
        else:
            pass
        if j == len(t)-1:
            ans += 1
            s = s[0:i+j] + '.' + s[i+j+1:len(s)]
            #print(s)

print(ans)