def yn(hantei, yes='Yes', no='No'): print(yes if hantei else no)
def p(*args): print(*args)
mod=10**9+7
a,b=map(int, input().split())
if a>b:
    a,b=b,a
if (b-a)%2==1:
    ans=(b-a)*(2*a+1)
    ans+=(2+2*a)*a
else:
    ans=(b-a+1)*(2*a+1)
    ans+=2*a*a
"""
if a%2==0:
    f=a+1
    ans=f+2*(2*f-1)*(b//2)
    if b%2==1:
        ans+=2*f
else:
    f=a
    ans=f+2*(2*f+1)*(b//2)
    if b%2==1:
        ans+=2*f
"""
p(ans%mod)