b = G[i][a];
        if ((BIT(V[i], MAX(a, b)) && !BIT(V[i], MIN(a, b))) ||
            (BIT(V2[i], MAX(a, b)) && !BIT(V2[i], MIN(a, b))))

            a = b;
        V[i] = V2[i];
        V2[i+1] = V[i+1]^(1<<a);