#yuki1005
s=input()
t=input()
if len(t)==1 and t in s:
 print(-1)
else:
 res=0
 cnt=0
 while len(t)+cnt<=len(s):
  if s[cnt:cnt+len(t)]==t:
   res+=1
   cnt+=len(t)-1
  else:
   cnt+=1
 print(res)