void main()
{   int d[10], 
        c[10];
    int l, i;

    for (i = 0; i < 10; i++)
        c[i] = 2;

    l = 40;

#define BEGIN_TRY(X) \
    for (d[X] = c[X]; d[X] <= l; d[X]++) \
    {   int v = d[X] % 10, w = d[X] / 10; \
        l -= d[X] + (w == 0); c[v]++; if (w > 0) c[w]++; \
        if ((v > X || c[v] <= d[v]) && (w == 0 || w > X || c[w] <= d[w]))

#define END_TRY(X) \
        l += d[X] + (w == 0); c[v]--; if (w > 0) c[w]--; \
    }

    BEGIN_TRY(0)
     BEGIN_TRY(1)
      BEGIN_TRY(2)
       BEGIN_TRY(3)
        BEGIN_TRY(4)
         BEGIN_TRY(5)
          BEGIN_TRY(6)
           BEGIN_TRY(7)
            BEGIN_TRY(8)
             BEGIN_TRY(9)
             {  int f = 1;
                for (i = 0; i < 10 && f; i++)
                    f = c[i] == d[i];
                if (f)
                {   for (i = 0; i < 10; i++) 
                        printf("%d ", d[i]);
                    printf("\n");
                }
             }
             END_TRY(9)
            END_TRY(8)
           END_TRY(7)
          END_TRY(6)
         END_TRY(5)
        END_TRY(4)
       END_TRY(3)
      END_TRY(2)
     END_TRY(1)
    END_TRY(0)
}