import sys
S=input()
T=input()
if len(T)==1 and T in S:
  print('-1')
  sys.exit()
if not(T in S):
  print(0)
  sys.exit()
L=len(S)
M=len(T)
i=0
P=0
while M-L+1>i:
  if S[i:i+M]==T:
    S=S[:i+M-1]+'.'+S[i+M:]
    P=P+1
  i=i+1
print(P)