MOD = 10 ** 9 + 7
INF = 10 ** 10
import sys
sys.setrecursionlimit(100000000)
dy = (-1,0,1,0)
dx = (0,1,0,-1)

def main():
    s = input()
    t = input()
    if len(t) == 1 and t in s:
        print(-1)
        return
    
    cnt = 0
    n = len(s)
    l = len(t)
    i = 0
    while i < n:
        if t == s[i:i + l]:
            cnt += 1
            i += l - 1
        else:
            i += 1
    print(cnt)  

if __name__ =='__main__':
    main()