def I(): return int(input())
def MI(): return map(int, input().split())
def LI(): return list(map(int, input().split()))

def main():
    mod=10**9+7
    S=list(input())
    T=list(input())
    ns=len(S)
    nt=len(T)
    
    if nt==1 and T[0] in S:
        print(-1)
        exit()
        
    cnt=0
    
    for i in range(ns-nt+1):
        if S[i:i+nt]==T:
            S[i+nt-2]="_"
            cnt+=1
            
    print(cnt)

        
    
    


main()