#include<cstdio>
#define mod 1000000007
typedef long long LL;
inline LL ksm(LL a,LL b){LL r=1;for(;b;a=a*a%mod,b>>=1)if(b&1)r=r*a%mod;return r;}
int main()
{
int n,m;
scanf("%d%d",&n,&m);
if(n > m)n ^= m ^= n ^= m;
if(n == 1)printf("%lld",ksm(2,m));
else if(n == 2)printf("%lld",4*ksm(3,m-1)%mod);
else if(n == 3)printf("%lld",112*ksm(3,m-3)%mod);
else
{
if(m == n)printf("%lld",(83*ksm(8,n)%mod+5*ksm(2,n+7)%mod)*190104168%mod);
else printf("%lld",(83*ksm(8,n)%mod+ksm(2,n+8))*ksm(3,m-n-1)%mod*570312504%mod);
}
return 0;
}

#include<cstdio>
#define mod 1000000007
typedef long long LL;
inline LL ksm(LL a,LL b){LL r=1;for(;b;a=a*a%mod,b>>=1)if(b&1)r=r*a%mod;return r;}
int main()
{
int n,m;
scanf("%d%d",&n,&m);
if(n > m)n ^= m ^= n ^= m;
if(n == 1)printf("%lld",ksm(2,m));
else if(n == 2)printf("%lld",4*ksm(3,m-1)%mod);
else if(n == 3)printf("%lld",112*ksm(3,m-3)%mod);
else
{
if(m == n)printf("%lld",(83*ksm(8,n)%mod+5*ksm(2,n+7)%mod)*190104168%mod);
else printf("%lld",(83*ksm(8,n)%mod+ksm(2,n+8))*ksm(3,m-n-1)%mod*570312504%mod);
}
return 0;
}