x,y = map(int,input().split())
a = []
for i in range(x):
    a.append([])
    for j in range(y):
        a[i].append(0)
a[0][0] = 1
k = x+y-2
l = 1
while k >= l:
    i = l+1
    while i >= 0:
        i -= 1
        j = l-i
        if x > i > -1 and y > j > -1:
            if j-1>=0 and i-2>=0: a[i][j] = a[i][j]+a[i-2][j-1]
            if j+1<y and i-2>=0: a[i][j] = a[i][j]+a[i-2][j+1]
            if j-2>=0 and i-1>=0: a[i][j] = a[i][j]+a[i-1][j-2]
            if j-2>=0 and i+1<x: a[i][j] = a[i][j]+a[i+1][j-2]        
    l += 1  
print(a[-1][-1]%1000007)