s = input()
t = input()
if len(s) == 1:
    if s in t:
        print(-1)
    else:
        print(0)
    exit()
    
ans = 0
pos = 0
n = len(t)
for st in s:
    if st == t[pos]:
        pos += 1
        if pos == n:
            ans += 1
            if t[0] == t[-1]:
                pos = 1
            else:
                pos = 0
    else:
        pos = 0
print(ans)