n,m = map(int,input().split())
if n == 1:
    print(1)
    exit()
mod = 10**9+7

### for bigger prime 
N = m+5
fact = [1]*N
finv = [1]*N
 
for i in range(2,N):
    fact[i] = (fact[i-1]*i)%mod
finv[-1] = pow(fact[-1],mod-2,mod)
for i in range(1,N)[::-1]:
    finv[i-1] = (finv[i]*i)%mod

def nCr(n,r):
    if r > n:
        return 0
    else: 
        return fact[n]*finv[r]%mod*finv[n-r]%mod


ans = 0

for i in range(m+1):
    pos = 2*i-m
    pos %= 2*n
    if pos == 0 or pos == 2*n-1:
        ans += nCr(m,i)
        ans %= mod
print(ans)