20  t2s_1(N0, 
i) = t1_2(
i);
 
   21  t2s_1(N0, 
i) += t1_2(
i);
 
   25  t2s_1(N0, 
i) -= t1_2(
i);
 
   30  t2s_1(N1, 
i) = t1_2(
i);
 
   31  t2s_1(N1, 
i) += t1_2(
i);
 
   35  t2s_1(N1, 
i) -= t1_2(
i);
 
   40  t2s_1(N2, 
i) = t1_2(
i);
 
   41  t2s_1(N2, 
i) += t1_2(
i);
 
   45  t2s_1(N2, 
i) -= t1_2(
i);