import sys
input = sys.stdin.readline

S=input().strip()
T=input().strip()

if len(T)==1 and T in S:
    print(-1)
    sys.exit()

i=0
ANS=0
L=len(T)
while i<len(S):
    if S[i:i+L]==T:
        ANS+=1
        i+=L-1
    else:
        i+=1
print(ANS)