# coding: utf-8
# Your code here!
S=input()
R=len(S)

T=input()
N=len(T)

if T in S and N==1:
    print(-1)
    exit()

i=0
while True:
    
    if S[i:i+N]==T:
        S=S[:i+N-1]+"."+S[i+N-1:]
    i+=1
    if i+N==len(S)+1:
        break
#print(S)
print(S.count("."))